diff --git a/ChangeLog b/ChangeLog
index ff3befc6..f89c9434 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -87,7 +87,7 @@ Sat Nov 10 21:55:19 2007 -0800 Charles Crayne
 Sat Nov 10 17:52:23 2007 -0800 Charles Crayne 
   * Clean up a few more 32-bit bottlenecks
 Fri Nov 9 16:37:41 2007 -0800 Charles Crayne 
-  * Update documantation for stack relative directives
+  * Update documentation for stack relative directives
 Fri Nov 9 16:33:54 2007 -0800 Charles Crayne 
   * Merge branch 'master' of /home/chuck/development/gitnasm/
 Fri Nov 9 16:25:43 2007 -0800 Charles Crayne 
@@ -1030,7 +1030,7 @@ Sat Nov 10 21:55:19 2007 -0800 Charles Crayne
 Sat Nov 10 17:52:23 2007 -0800 Charles Crayne 
   * Clean up a few more 32-bit bottlenecks
 Fri Nov 9 16:37:41 2007 -0800 Charles Crayne 
-  * Update documantation for stack relative directives
+  * Update documentation for stack relative directives
 Fri Nov 9 16:33:54 2007 -0800 Charles Crayne 
   * Merge branch 'master' of /home/chuck/development/gitnasm/
 Fri Nov 9 16:25:43 2007 -0800 Charles Crayne 
@@ -1903,7 +1903,7 @@ Sat Nov 10 21:55:19 2007 -0800 Charles Crayne
 Sat Nov 10 17:52:23 2007 -0800 Charles Crayne 
   * Clean up a few more 32-bit bottlenecks
 Fri Nov 9 16:37:41 2007 -0800 Charles Crayne 
-  * Update documantation for stack relative directives
+  * Update documentation for stack relative directives
 Fri Nov 9 16:33:54 2007 -0800 Charles Crayne 
   * Merge branch 'master' of /home/chuck/development/gitnasm/
 Fri Nov 9 16:25:43 2007 -0800 Charles Crayne 
@@ -2851,7 +2851,7 @@ Thu Apr 12 16:12:09 2007 +0000 H. Peter Anvin
    * (*.c): added c99 data-type compliance and <inttypes.h> inclusion.
    * (*.pl): added c99 data-type compliance and <inttypes.h> inclusion.
    * (*.h): added c99 data-type compliance.
-   * (assemble.h): fixed procedure defintions to sync with respective
+   * (assemble.h): fixed procedure definitions to sync with respective
    procedure declarations.
 
 2002-05-16  Ed Beroset <beroset@mindspring.com>
diff --git a/INSTALL b/INSTALL
index d184982f..76411c5b 100644
--- a/INSTALL
+++ b/INSTALL
@@ -67,7 +67,7 @@ $ make install_everything
 to install everything =)
 
 
-Thats it, enjoy!
+That's it, enjoy!
 
 
 2. Installing NASM from source (Windows - MS Visual C++)
diff --git a/asm/assemble.c b/asm/assemble.c
index cd3f4693..6593a118 100644
--- a/asm/assemble.c
+++ b/asm/assemble.c
@@ -3244,7 +3244,7 @@ static int process_ea(operand *input, ea *output, int bits,
     /*
      * The type parsed might not match one supplied by
      * a caller. In this case exit with error and let
-     * the caller to deside how critical it is.
+     * the caller to decide how critical it is.
      */
     if (output->type != expected)
         goto err_set_msg;
diff --git a/asm/error.c b/asm/error.c
index 1e241c7b..18d3f863 100644
--- a/asm/error.c
+++ b/asm/error.c
@@ -169,7 +169,7 @@ void reset_warnings(void)
  *
  * Special pseudo-warnings:
  *
- *!other [on] any warning not specifially mentioned above
+ *!other [on] any warning not specifically mentioned above
  *!  specifies any warning not included in any specific warning class.
  *
  *!all [all] all possible warnings
diff --git a/asm/nasm.c b/asm/nasm.c
index 6af92754..1a8b82be 100644
--- a/asm/nasm.c
+++ b/asm/nasm.c
@@ -2235,7 +2235,7 @@ static void help(FILE *out)
         "    -o outfile    write output to outfile\n"
         "    --keep-all    output files will not be removed even if an error happens\n"
         "\n"
-        "    -Xformat      specifiy error reporting format (gnu or vc)\n"
+        "    -Xformat      specify error reporting format (gnu or vc)\n"
         "    -s            redirect error messages to stdout\n"
         "    -Zfile        redirect error messages to file\n"
         "\n"
@@ -2265,7 +2265,7 @@ static void help(FILE *out)
         "       -Ld        show byte and repeat counts in decimal, not hex\n"
         "       -Le        show the preprocessed output\n"
         "       -Lf        ignore .nolist (force output)\n"
-        "       -Lm        show multi-line macro calls with expanded parmeters\n"
+        "       -Lm        show multi-line macro calls with expanded parameters\n"
         "       -Lp        output a list file every pass, in case of errors\n"
         "       -Ls        show all single-line macro definitions\n"
         "       -Lw        flush the output after every line (very slow!)\n"
diff --git a/asm/pptok.pl b/asm/pptok.pl
index f40cb58e..0ba6bed6 100755
--- a/asm/pptok.pl
+++ b/asm/pptok.pl
@@ -268,7 +268,7 @@ if ($what eq 'c') {
 
     my %tasmtokens = ();
     foreach $pt (@tasm) {
-	# TASM compatiblity token
+	# TASM compatibility token
 	$nasmt = '%'.$pt;
 	if (!defined($tokens{$nasmt})) {
 	    die "$in: TASM compat token $pt does not have a ".
diff --git a/asm/preproc.c b/asm/preproc.c
index cb1669da..caf89f41 100644
--- a/asm/preproc.c
+++ b/asm/preproc.c
@@ -1118,7 +1118,7 @@ hash_findix(struct hash_table *hash, const char *str)
 }
 
 /*
- * read line from standart macros set,
+ * read line from standard macros set,
  * if there no more left -- return NULL
  */
 static char *line_from_stdmac(void)
@@ -2774,7 +2774,7 @@ smacro_expand_default(const SMacro *s, Token **params, int nparams)
 }
 
 /*
- * Emit a macro defintion or undef to the listing file or debug format
+ * Emit a macro definition or undef to the listing file or debug format
  * if desired. This is similar to detoken(), but it handles the
  * reverse expansion list, does not expand %! or local variable
  * tokens, and does some special handling for macro parameters.
@@ -3265,7 +3265,7 @@ static bool parse_mmacro_spec(Token *tline, MMacro *def, const char *directive)
             *comma = NULL;
             def->ndefs--;
             nasm_warn(WARN_MACRO_PARAMS_LEGACY,
-                      "dropping trailing empty default parameter in defintion of multi-line macro `%s'",
+                      "dropping trailing empty default parameter in definition of multi-line macro `%s'",
                       def->name);
         }
     } else {
@@ -3479,7 +3479,7 @@ static int line_directive(Token *origline, Token *tline)
             const char *fname;
             /*
              * If this is a quoted string, ignore anything after
-             * it; this allows for compatiblity with gcc's
+             * it; this allows for compatibility with gcc's
              * additional flags options.
              */
 
@@ -3601,7 +3601,7 @@ static int do_directive(Token *tline, Token **output)
     *output = NULL;             /* No output generated */
     origline = tline;
 
-    /* cpp-like line directive, must not be preceeded by whitespace */
+    /* cpp-like line directive, must not be preceded by whitespace */
     if (tok_is(tline, '#'))
         return line_directive(origline, tline);
 
@@ -3754,7 +3754,7 @@ static int do_directive(Token *tline, Token **output)
         const char *arg;
 
         /* Directive to tell NASM what the default stack size is. The
-         * default is for a 16-bit stack, and this can be overriden with
+         * default is for a 16-bit stack, and this can be overridden with
          * %stacksize large.
          */
         tline = skip_white(tline->next);
@@ -4942,7 +4942,7 @@ static inline bool pp_concat_match(const Token *t, enum concat_flags mask)
 }
 
 /*
- * This routines walks over tokens strem and handles tokens
+ * This routines walks over tokens stream and handles tokens
  * pasting, if @handle_explicit passed then explicit pasting
  * term is handled, otherwise -- implicit pastings only.
  * The @m array can contain a series of token types which are
@@ -6365,7 +6365,7 @@ static void list_mmacro_call(const MMacro *m)
         *p++ = ',';
     }
 
-    *--p = '\0';                /* Replace last delimeter with null */
+    *--p = '\0';                /* Replace last delimiter with null */
     lfmt->line(LIST_MACRO, -1, buf);
     nasm_free(buf);
 }
@@ -6966,7 +6966,7 @@ static void pp_reset_stdmac(enum preproc_mode mode)
      * 0 = dependencies only
      * 1 = preparatory passes
      * 2 = final pass
-     * 3 = preproces only
+     * 3 = preprocess only
      */
     switch (mode) {
     case PP_NORMAL:
diff --git a/asm/quote.c b/asm/quote.c
index 301abed7..074f17d2 100644
--- a/asm/quote.c
+++ b/asm/quote.c
@@ -481,7 +481,7 @@ size_t nasm_unquote(char *str, char **ep)
 }
 
 /*
- * Unquote a string indended to be used as a C string; most control
+ * Unquote a string intended to be used as a C string; most control
  * characters are rejected, including whitespace characters that
  * would imply line endings and so on.
  */
diff --git a/asm/warnings.pl b/asm/warnings.pl
index 11356860..4f0433d4 100755
--- a/asm/warnings.pl
+++ b/asm/warnings.pl
@@ -85,7 +85,7 @@ sub find_warnings {
 			     doc => [], file => $infile, line => $nline};
 
 		    if (defined(my $that = $aliases{$name})) {
-			# Duplicate defintion?!
+			# Duplicate definition?!
 			printf STDERR "%s:%s: warning %s previously defined at %s:%s\n",
 			    $infile, $nline, $name, $that->{file}, $that->{line};
 		    } else {
diff --git a/autoconf/helpers/config.sub b/autoconf/helpers/config.sub
index b51fb8cd..2d5bbeee 100755
--- a/autoconf/helpers/config.sub
+++ b/autoconf/helpers/config.sub
@@ -149,7 +149,7 @@ case $1 in
 		esac
 		;;
 	*-*)
-		# A lone config we happen to match not fitting any patern
+		# A lone config we happen to match not fitting any pattern
 		case $field1-$field2 in
 			decstation-3100)
 				basic_machine=mips-dec
@@ -950,7 +950,7 @@ unset -v basic_machine
 
 # Decode basic machines in the full and proper CPU-Company form.
 case $cpu-$vendor in
-	# Here we handle the default manufacturer of certain CPU types in cannonical form. It is in
+	# Here we handle the default manufacturer of certain CPU types in canonical form. It is in
 	# some cases the only manufacturer, in others, it is the most popular.
 	craynv-unknown)
 		vendor=cray
@@ -1101,7 +1101,7 @@ case $cpu-$vendor in
 		cpu=`echo "$cpu" | sed 's/^xscale/arm/'`
 		;;
 
-	# Recognize the cannonical CPU Types that limit and/or modify the
+	# Recognize the canonical CPU Types that limit and/or modify the
 	# company names they are paired with.
 	cr16-*)
 		os=${os:-elf}
@@ -1150,7 +1150,7 @@ case $cpu-$vendor in
 		;;
 
 	*)
-		# Recognize the cannonical CPU types that are allowed with any
+		# Recognize the canonical CPU types that are allowed with any
 		# company name.
 		case $cpu in
 			1750a | 580 \
diff --git a/autoconf/m4/pa_c_typeof.m4 b/autoconf/m4/pa_c_typeof.m4
index 87b9ed60..909b1712 100644
--- a/autoconf/m4/pa_c_typeof.m4
+++ b/autoconf/m4/pa_c_typeof.m4
@@ -1,7 +1,7 @@
 dnl --------------------------------------------------------------------------
 dnl PA_C_TYPEOF
 dnl
-dnl Find if typeof() exists, or an equvalent (__typeof__, decltype,
+dnl Find if typeof() exists, or an equivalent (__typeof__, decltype,
 dnl __decltype__)
 dnl --------------------------------------------------------------------------
 AC_DEFUN([PA_C_TYPEOF],
diff --git a/doc/changes.src b/doc/changes.src
index cc695122..b74e41f7 100644
--- a/doc/changes.src
+++ b/doc/changes.src
@@ -85,7 +85,7 @@ in \c{%+} tokens at the beginning or end, or multiple ones in a row.
 
 \b Fix macro label capture (\c{%00}, \k{percent00}).
 
-\b Much better documentation for the MASM compatiblity package,
+\b Much better documentation for the MASM compatibility package,
 \c{%use masm} (see \k{pkg_masm}).
 
 \b Fix \c{LEA} without square brackets, for MASM compatibility.
@@ -233,7 +233,7 @@ generation pass if a list file is specified.
 
 \S{cl-2.14.01} Version 2.14.01
 
-\b Create all system-defined macros defore processing command-line
+\b Create all system-defined macros before processing command-line
 given preprocessing directives (\c{-p}, \c{-d}, \c{-u}, \c{--pragma},
 \c{--before}).
 
@@ -595,7 +595,7 @@ files. See \k{opt-keep-all}.
 \b Fix \c{-MD} option handling, which was rather broken in previous
 release changing command line api.
 
-\b Fix access to unitialized space when handling strings with
+\b Fix access to uninitialized space when handling strings with
 a single grave.
 
 \b Fix nil dereference in handling memory reference parsing.
@@ -870,7 +870,7 @@ only integer logarithms.  See \k{pkg_ifunc}.
 
 \S{cl-2.09.04} Version 2.09.04
 
-\b Fix incorrect labels offset for VEX intructions.
+\b Fix incorrect labels offset for VEX instructions.
 
 \b Eliminate bogus warning on implicit operand size override.
 
@@ -888,7 +888,7 @@ only integer logarithms.  See \k{pkg_ifunc}.
    too early and sometime simply wrong. Move behaviour back to
    the origins (down to NASM 2.05.01).
 
-\b Fix unitialized data dereference on OMF output format.
+\b Fix uninitialized data dereference on OMF output format.
 
 \b Issue warning on unterminated \c{%{} construct.
 
@@ -941,7 +941,7 @@ only integer logarithms.  See \k{pkg_ifunc}.
 
 \b Macros parameters range expansion introduced. See \k{mlmacrange}.
 
-\b Backward compatibility on expanging of local sigle macros restored.
+\b Backward compatibility on expanging of local single macros restored.
 
 \b 8 bit relocations for \c{elf} and \c{bin} output formats are introduced.
 
@@ -1636,7 +1636,7 @@ it 0.98.28 to not confuse poor little apt-get.
 
 \b Line continuation character \c{\\}.
 
-\b Docs inadvertantly reverted - "dos packaging".
+\b Docs inadvertently reverted - "dos packaging".
 
 
 \S{cl-0.98.24p1} Version 0.98.24p1
@@ -2098,7 +2098,7 @@ in macros etc. For example:
 
 \>    In this example the "if" mmacro enters into the "if" context, so %$arg1
     is not valid anymore inside "if". Of course it could be worked around
-    by using explicitely %$$arg1 but this is ugly IMHO.
+    by using explicitly %$$arg1 but this is ugly IMHO.
 
 \b Fixed memory leak in \c{%undef}. The origline wasn't freed before
     exiting on success.
diff --git a/doc/genps.pl b/doc/genps.pl
index 72985cc7..e41c4367 100755
--- a/doc/genps.pl
+++ b/doc/genps.pl
@@ -358,7 +358,7 @@ sub string2array($)
 }
 
 #
-# Take a crossreference name and generate the PostScript name for it.
+# Take a cross-reference name and generate the PostScript name for it.
 #
 # This hack produces a somewhat smaller PDF...
 #%ps_xref_list = ();
@@ -417,7 +417,7 @@ sub ps_flow_lines($$$@) {
 		$pastmarker = 1;
 	    }
 	    if ( $$e[0] == -1 || $$e[0] == -6 ) {
-		# -1 (end anchor) or -6 (marker) goes with the preceeding
+		# -1 (end anchor) or -6 (marker) goes with the preceding
 		# text, otherwise with the subsequent text
 		push(@l, $e);
 	    } else {
@@ -743,7 +743,7 @@ $npara = scalar(@paras);
 @pslines    = ();
 
 #
-# Line Auxilliary Information Types
+# Line Auxiliary Information Types
 #
 $AuxStr	    = 1;		# String
 $AuxPage    = 2;		# Page number (from xref)
@@ -790,7 +790,7 @@ sub ps_break_lines($$) {
 	    my $sech = $2;
 	    my $font = ($ptype eq 'head') ? \%HeadFont : \%SubhFont;
 	    @ls = ps_flow_lines($linewidth, $font, $ptype, @data);
-	    # We need the heading number as auxillary data
+	    # We need the heading number as auxilary data
 	    $ls[0]->[0]->[2] = [[$AuxStr,$secn]];
 	} elsif ( $ptype eq 'norm' ) {
 	    @ls = ps_flow_lines($linewidth, \%BodyFont, $ptype, @data);
@@ -813,7 +813,7 @@ sub ps_break_lines($$) {
 				$psconf{tocpnz}-$refwidth,
 				\%BodyFont, $ptype, @data);
 
-	    # Auxilliary data: for the first line, the cross reference symbol
+	    # Auxiliary data: for the first line, the cross reference symbol
 	    # and the reference name; for all lines but the first, the
 	    # reference width; and for the last line, the page number
 	    # as a string.
@@ -1318,7 +1318,7 @@ foreach $line ( @pslines ) {
 	    } elsif ( $$x[0] == $AuxNum ) {
 		print $$x[1],' ';
 	    } else {
-		die "Unknown auxilliary data type";
+		die "Unknown auxiliary data type";
 	    }
 	}
     }
diff --git a/doc/nasmdoc.src b/doc/nasmdoc.src
index 91b4cf7c..85939f6b 100644
--- a/doc/nasmdoc.src
+++ b/doc/nasmdoc.src
@@ -40,7 +40,7 @@
 \M{author}{The NASM Development Team}
 \M{copyright_tail}{-- All Rights Reserved}
 \M{license}{This document is redistributable under the license given in the section "License".}
-\M{summary}{This file documents NASM, the Netwide Assembler: an assembler targetting the Intel x86 series of processors, with portable source.}
+\M{summary}{This file documents NASM, the Netwide Assembler: an assembler targeting the Intel x86 series of processors, with portable source.}
 \M{infoname}{NASM}
 \M{infofile}{nasm}
 \M{infotitle}{The Netwide Assembler for x86}
@@ -775,7 +775,7 @@ which depend on the values of symbols: so code such as
 
 will cause an error in \i{preprocess-only mode}.
 
-For compatiblity with older version of NASM, this option can also be
+For compatibility with older version of NASM, this option can also be
 written \c{-e}.  \c{-E} in older versions of NASM was the equivalent
 of the current \c{-Z} option, \k{opt-Z}.
 
@@ -1314,7 +1314,7 @@ keywords:
 
 \> Note that a \e{list} needs to be prefixed with a \I{%db}\c{%} sign unless
 prefixed by either \c{DUP} or a \e{type} in order to avoid confusing it with
-a parentesis starting an expression. The following expressions are all
+a parenthesis starting an expression. The following expressions are all
 valid:
 
 \c        db 33
@@ -1528,7 +1528,7 @@ In 64-bit mode, NASM will by default generate absolute addresses.  The
 this is frequently the normally desired behaviour, see the \c{DEFAULT}
 directive (\k{default}). The keyword \i\c{ABS} overrides \i\c{REL}.
 
-A new form of split effective addres syntax is also supported. This is
+A new form of split effective address syntax is also supported. This is
 mainly intended for mib operands as used by MPX instructions, but can
 be used for any memory reference. The basic concept of this form is
 splitting base and index.
@@ -1888,7 +1888,7 @@ NASM supports the following comparison operators:
 
 \b \i\c{>} compares signed greater than.
 
-\b \i\c{>=} compares signed greather than or equal.
+\b \i\c{>=} compares signed greater than or equal.
 
 These operators evaluate to 0 for false or 1 for true.
 
@@ -2685,7 +2685,7 @@ than the description:
 As with \c{%strlen} (see \k{strlen}), the first parameter is the
 single-line macro to be created and the second is the string. The
 third parameter specifies the first character to be selected, and the
-optional fourth parameter preceeded by comma) is the length.  Note
+optional fourth parameter preceded by comma) is the length.  Note
 that the first index is 1, not 0 and the last index is equal to the
 value that \c{%strlen} would assign given the same string. Index
 values out of range result in an empty string.  A negative length
@@ -3001,9 +3001,9 @@ number of parameters. It can be used as an argument to \c{%rep}
 Examples are given in \k{rotate}.
 
 
-\S{percent00} \i\c{%00}: \I{label preceeding macro}Label Preceeding Macro
+\S{percent00} \i\c{%00}: \I{label preceding macro}Label Preceding Macro
 
-\c{%00} will return the label preceeding the macro invocation, if any. The
+\c{%00} will return the label preceding the macro invocation, if any. The
 label must be on the same line as the macro invocation, may be a local label
 (see \k{locallab}), and need not end in a colon.
 
@@ -3381,7 +3381,7 @@ identifier. \c{$} and \c{$$} are \e{not} considered identifiers by
 \c{%ifid}.
 
 \c{%ifnum} works similarly, but tests for the token being an integer
-numeric constant (not an expression!) possibly preceeded by \c{+} or
+numeric constant (not an expression!) possibly preceded by \c{+} or
 \c{-}; \c{%ifstr} tests for it being a quoted string.
 
 For example, the \c{writefile} macro defined in \k{mlmacgre} can be
@@ -4075,7 +4075,7 @@ are defined.
 \b \c{debug}: debug format options.
 
 In addition, the name of any output or debug format, and sometimes
-groups thereof, also constitue \c{%pragma} namespaces. The namespaces
+groups thereof, also constitute \c{%pragma} namespaces. The namespaces
 \c{output} and \c{debug} simply refer to \e{any} output or debug
 format, respectively.
 
@@ -4212,7 +4212,7 @@ Most \i{user-level directives} (see \k{directive}) are implemented as
 macros which invoke primitive directives; these are described in
 \k{directive}. The rest of the standard macro set is described here.
 
-For compability with NASM versions before NASM 2.15, most standard
+For compatibility with NASM versions before NASM 2.15, most standard
 macros of the form \c{__?foo?__} have aliases of form \c{__foo__} (see
 \k{defalias}). These can be removed with the directive \c{%clear
 defalias}.
@@ -4892,7 +4892,7 @@ The \c{BITS} directive has an exactly equivalent primitive form,
 \c{[BITS 16]}, \c{[BITS 32]} and \c{[BITS 64]}. The user-level form is
 a macro which has no function other than to call the primitive form.
 
-Note that the space is neccessary, e.g. \c{BITS32} will \e{not} work!
+Note that the space is necessary, e.g. \c{BITS32} will \e{not} work!
 
 \S{USE16 & USE32} \i\c{USE16} & \i\c{USE32}: Aliases for BITS
 
@@ -6375,7 +6375,7 @@ right-hand side of the \c{WRT} operator:
 \b \c{..gotpcrel} is used to specify references to the Global Offset
    Table.  The GOT is supported in the \c{macho64} format only.
 
-\S{macho-ssvs} \c{macho} specfic directive \i\c{subsections_via_symbols}
+\S{macho-ssvs} \c{macho} specific directive \i\c{subsections_via_symbols}
 
 The directive \c{subsections_via_symbols} sets the
 \c{MH_SUBSECTIONS_VIA_SYMBOLS} flag in the Mach-O header, that effectively
@@ -6390,7 +6390,7 @@ non-Mach-O builds of the same source code:
 
 \c      %pragma macho subsections_via_symbols
 
-\S{macho-ssvs} \c{macho} specfic directive \i\c{no_dead_strip}
+\S{macho-ssvs} \c{macho} specific directive \i\c{no_dead_strip}
 
 The directive \c{no_dead_strip} sets the Mach-O \c{SH_NO_DEAD_STRIP}
 section flag on the section containing a a specific symbol.  This
diff --git a/doc/opt_var.txt b/doc/opt_var.txt
index af15c03d..79aeb527 100644
--- a/doc/opt_var.txt
+++ b/doc/opt_var.txt
@@ -14,7 +14,7 @@ GLOBAL variables:
                             references generate long offsets; always
                             assembles
                             no optimization passes
-                        2 or more specifies optmization passes.  5 is
+                        2 or more specifies optimization passes.  5 is
                             the actual recommended minimum setting
                             optimization passes (2 or more, plus
                             passes 1 and 2 will be required)
diff --git a/doc/pspdf.pl b/doc/pspdf.pl
index 55df3c23..503480bd 100755
--- a/doc/pspdf.pl
+++ b/doc/pspdf.pl
@@ -96,7 +96,7 @@ exit 0 if ( !$r && -f $out );
 # 2. ps2pdf (from Ghostscript)
 #
 # GhostScript uses # rather than = to separate options and values on Windows,
-# it seems.  Similary it uses ; in path lists rather than :.
+# it seems.  Similarly it uses ; in path lists rather than :.
 # Call gs directly rather than ps2pdf, because -dSAFER
 # breaks font discovery on some systems, apparently.
 win32_gs_help();
diff --git a/doc/rdsrc.pl b/doc/rdsrc.pl
index 3f90d461..f1e49352 100644
--- a/doc/rdsrc.pl
+++ b/doc/rdsrc.pl
@@ -758,7 +758,7 @@ sub write_html {
   select TEXT;
   &html_preamble(0);
   print "<p>This manual documents NASM, the Netwide Assembler: an assembler\n";
-  print "targetting the Intel x86 series of processors, with portable source.\n</p>";
+  print "targeting the Intel x86 series of processors, with portable source.\n</p>";
   print "<div class=\"toc\">\n";
   $level = 0;
   for ($node = $tstruct_next{'Top'}; $node; $node = $tstruct_next{$node}) {
diff --git a/include/nasm.h b/include/nasm.h
index 4d0dcafd..3fb7fe93 100644
--- a/include/nasm.h
+++ b/include/nasm.h
@@ -797,7 +797,7 @@ typedef uint64_t iflags_t;
  *
  * DIRR_BADPARAM causes a generic error message to be printed.  Note
  * that it is an error, not a warning, even in the case of pragmas;
- * don't use it where forward compatiblity would be compromised
+ * don't use it where forward compatibility would be compromised
  * (instead consider adding a DIRR_WARNPARAM.)
  */
 enum directive_result {
diff --git a/include/opflags.h b/include/opflags.h
index f5dd50ba..179b1e03 100644
--- a/include/opflags.h
+++ b/include/opflags.h
@@ -1,5 +1,5 @@
 /* ----------------------------------------------------------------------- *
- *   
+ *
  *   Copyright 1996-2018 The NASM Authors - All Rights Reserved
  *   See the file AUTHORS included with the NASM distribution for
  *   the specific copyright holders.
@@ -14,7 +14,7 @@
  *     copyright notice, this list of conditions and the following
  *     disclaimer in the documentation and/or other materials provided
  *     with the distribution.
- *     
+ *
  *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
@@ -99,7 +99,7 @@
 #define GEN_SUBCLASS(bit)       OP_GENBIT(bit, SUBCLASS_SHIFT)
 
 /*
- * Special flags. Context dependant.
+ * Special flags. Context dependent.
  *
  * Bits: 26 - 32
  */
diff --git a/macros/masm.mac b/macros/masm.mac
index 6bd27273..f476364f 100644
--- a/macros/masm.mac
+++ b/macros/masm.mac
@@ -34,7 +34,7 @@
 ;;
 ;; masm.mac
 ;;
-;; Very limited MASM compatiblity package; intended to be used
+;; Very limited MASM compatibility package; intended to be used
 ;; primarily with machine-generated code. It does not include any
 ;; "programmer friendly" shortcuts, nor does it in any way support
 ;; ASSUME, symbol typing, or MASM-style structures.
diff --git a/macros/standard.mac b/macros/standard.mac
index a2ab4fc1..1fdfdc86 100644
--- a/macros/standard.mac
+++ b/macros/standard.mac
@@ -270,7 +270,7 @@ STD: nasm
 %defalias __PTR__             __?PTR?__
 %defalias __PASS__            __?PASS?__
 
-; Backwards compatiblity aliases for tokens. The extra level of indirection here
+; Backwards compatibility aliases for tokens. The extra level of indirection here
 ; means %aliases on|off will do the right thing for these as well.
 %idefine __?infinity?__ %?
 %idefine __?nan?__ %?
diff --git a/misc/Doxyfile b/misc/Doxyfile
index 1bb1cc3b..d3bd8d25 100644
--- a/misc/Doxyfile
+++ b/misc/Doxyfile
@@ -139,7 +139,7 @@ STRIP_CODE_COMMENTS    = YES
 # file names in lower case letters. If set to YES upper case letters are also 
 # allowed. This is useful if you have classes or files whose names only differ 
 # in case and if your file system supports case sensitive file names. Windows 
-# users are adviced to set this option to NO.
+# users are advised to set this option to NO.
 
 CASE_SENSE_NAMES       = YES
 
@@ -165,7 +165,7 @@ SHOW_INCLUDE_FILES     = YES
 # will interpret the first line (until the first dot) of a JavaDoc-style 
 # comment as the brief description. If set to NO, the JavaDoc 
 # comments  will behave just like the Qt-style comments (thus requiring an 
-# explict @brief command for a brief description. 
+# explicit @brief command for a brief description. 
 
 JAVADOC_AUTOBRIEF      = NO
 
@@ -532,7 +532,7 @@ COMPACT_RTF            = NO
 RTF_HYPERLINKS         = NO
 
 # Load stylesheet definitions from file. Syntax is similar to doxygen's 
-# config file, i.e. a series of assigments. You only have to provide 
+# config file, i.e. a series of assignments. You only have to provide 
 # replacements, missing definitions are set to their default value. 
 
 RTF_STYLESHEET_FILE    = 
diff --git a/misc/proc32.ash b/misc/proc32.ash
index f513b733..b0633ec5 100644
--- a/misc/proc32.ash
+++ b/misc/proc32.ash
@@ -1,18 +1,18 @@
 ;--------=========xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=========--------
 ;
 ;   Copyright (C) 1999 by Andrew Zabolotny
-;   Miscelaneous NASM macros that makes use of new preprocessor features
-; 
+;   Miscellaneous NASM macros that makes use of new preprocessor features
+;
 ;   This library is free software; you can redistribute it and/or
 ;   modify it under the terms of the GNU Library General Public
 ;   License as published by the Free Software Foundation; either
 ;   version 2 of the License, or (at your option) any later version.
-; 
+;
 ;   This library is distributed in the hope that it will be useful,
 ;   but WITHOUT ANY WARRANTY; without even the implied warranty of
 ;   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 ;   Library General Public License for more details.
-; 
+;
 ;   You should have received a copy of the GNU Library General Public
 ;   License along with this library; if not, write to the Free
 ;   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
@@ -404,7 +404,7 @@ __end_%1:
 ; Summary:
 ;   define the "else" branch of a conditional statement
 ; Arguments:
-;   optionaly: "short" if jmp to endif is less than 128 bytes away
+;   optionally: "short" if jmp to endif is less than 128 bytes away
 ; Example:
 ;		else
 ;-----======xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx======-----
diff --git a/misc/scitech.mac b/misc/scitech.mac
index 26f85f49..2e7f7ee2 100644
--- a/misc/scitech.mac
+++ b/misc/scitech.mac
@@ -22,11 +22,11 @@
 ;* Language:    NetWide Assembler (NASM) or Turbo Assembler (TASM)
 ;* Environment: Any Intel Environment
 ;*
-;* Description: Macros to provide memory model independant assembly language
+;* Description: Macros to provide memory model independent assembly language
 ;*              module for C programming. Supports the large and flat memory
 ;*				models.
 ;*
-;*          	The defines that you should use when assembling modules that
+;*		The defines that you should use when assembling modules that
 ;*				use this macro package are:
 ;*
 ;*					__LARGE__	Assemble for 16-bit large model
@@ -88,18 +88,18 @@ ifdef __NASM_MAJOR__
 %idefine _bp	ebp
 %idefine _sp	esp
 %idefine _es
-%idefine UCHAR 	BYTE		; Size of a character
+%idefine UCHAR	BYTE		; Size of a character
 %idefine USHORT WORD		; Size of a short
-%idefine UINT 	DWORD		; Size of an integer
-%idefine ULONG 	DWORD		; Size of a long
-%idefine BOOL 	DWORD      	; Size of a boolean
-%idefine DPTR 	DWORD		; Size of a data pointer
-%idefine FDPTR 	FWORD		; Size of a far data pointer
-%idefine NDPTR 	DWORD		; Size of a near data pointer
-%idefine CPTR 	DWORD		; Size of a code pointer
-%idefine FCPTR 	FWORD		; Size of a far code pointer
-%idefine NCPTR 	DWORD		; Size of a near code pointer
-%idefine FPTR 	NEAR		; Distance for function pointers
+%idefine UINT	DWORD		; Size of an integer
+%idefine ULONG	DWORD		; Size of a long
+%idefine BOOL	DWORD		; Size of a boolean
+%idefine DPTR	DWORD		; Size of a data pointer
+%idefine FDPTR	FWORD		; Size of a far data pointer
+%idefine NDPTR	DWORD		; Size of a near data pointer
+%idefine CPTR	DWORD		; Size of a code pointer
+%idefine FCPTR	FWORD		; Size of a far code pointer
+%idefine NCPTR	DWORD		; Size of a near code pointer
+%idefine FPTR	NEAR		; Distance for function pointers
 %idefine DUINT	dd			; Declare a integer variable
 %idefine intsize 4
 %idefine flatmodel 1
@@ -113,17 +113,17 @@ ifdef __NASM_MAJOR__
 %idefine _bp	bp
 %idefine _sp	sp
 %idefine _es	es:
-%idefine UCHAR 	BYTE      	; Size of a character
+%idefine UCHAR	BYTE		; Size of a character
 %idefine USHORT WORD		; Size of a short
-%idefine UINT 	WORD		; Size of an integer
-%idefine ULONG 	DWORD		; Size of a long
-%idefine BOOL 	WORD		; Size of a boolean
-%idefine DPTR 	DWORD		; Size of a data pointer
-%idefine FDPTR 	DWORD		; Size of a far data pointer
-%idefine NDPTR 	WORD		; Size of a near data pointer
-%idefine CPTR 	DWORD		; Size of a code pointer
-%idefine FCPTR 	DWORD		; Size of a far code pointer
-%idefine NCPTR 	WORD		; Size of a near code pointer
+%idefine UINT	WORD		; Size of an integer
+%idefine ULONG	DWORD		; Size of a long
+%idefine BOOL	WORD		; Size of a boolean
+%idefine DPTR	DWORD		; Size of a data pointer
+%idefine FDPTR	DWORD		; Size of a far data pointer
+%idefine NDPTR	WORD		; Size of a near data pointer
+%idefine CPTR	DWORD		; Size of a code pointer
+%idefine FCPTR	DWORD		; Size of a far code pointer
+%idefine NCPTR	WORD		; Size of a near code pointer
 %idefine FPTR   FAR			; Distance for function pointers
 %idefine DUINT	dw			; Declare a integer variable
 %idefine intsize 2
@@ -630,19 +630,19 @@ endif
 ; environment
 
 ifdef	__WINDOWS16__
-__WINDOWS__ 		= 1
+__WINDOWS__		= 1
 endif
 ifdef	__WINDOWS32__
-__WINDOWS__ 		= 1
-__WINDOWS32_386__ 	= 1
+__WINDOWS__		= 1
+__WINDOWS32_386__	= 1
 endif
 ifdef	__WIN386__
-__WINDOWS__ 		= 1
-__WINDOWS32_386__ 	= 1
+__WINDOWS__		= 1
+__WINDOWS32_386__	= 1
 endif
 ifdef	__VXD__
-__WINDOWS__ 		= 1
-__WINDOWS32_386__ 	= 1
+__WINDOWS__		= 1
+__WINDOWS32_386__	= 1
 		MASM
 		.386
 		NO_SEGMENTS	= 1
@@ -656,7 +656,7 @@ endif
 ifdef   __FLAT__
 		_ax			EQU	eax		; EAX is used for accumulator
 		_bx			EQU	ebx		; EBX is used for accumulator
-		_cx        	EQU ecx     ; ECX is used for looping
+		_cx			EQU	ecx		; ECX is used for looping
 		_dx			EQU	edx		; EDX is used for data register
 		_si			EQU	esi		; ESI is the source index register
 		_di			EQU	edi		; EDI is the destination index register
@@ -683,7 +683,7 @@ ifdef   __FLAT__
 else
 		_ax			EQU	ax		; AX is used for accumulator
 		_bx			EQU	bx		; BX is used for accumulator
-		_cx        	EQU cx     	; CX is used for looping
+		_cx			EQU	cx		; CX is used for looping
 		_dx			EQU	dx		; DX is used for data register
 		_si			EQU	si		; SI is the source index register
 		_di			EQU	di		; DI is the destination index register
@@ -904,21 +904,21 @@ ENDM
 ; Macro to start a C callable function. This will be a far function for
 ; 16-bit code, and a near function for 32-bit code.
 
-MACRO   cprocstatic name       	; Set up model independant private proc
+MACRO   cprocstatic name	; Set up model independent private proc
 ifdef flatmodel
-PROC   	name NEAR
+PROC	name NEAR
 else
 PROC    name FAR
 endif
 LocalSize	= 0
 ENDM
 
-MACRO   cprocstart name        	; Set up model independant proc
+MACRO   cprocstart name		; Set up model independent proc
 ifdef flatmodel
 ifdef	__NOU__
-PROC   	name NEAR
+PROC	name NEAR
 else
-PROC   	_&name& NEAR
+PROC	_&name& NEAR
 endif
 else
 ifdef	__NOU__
@@ -931,7 +931,7 @@ LocalSize	= 0
 		cglobalfunc	name
 ENDM
 
-MACRO   cprocnear name         	; Set up near proc
+MACRO   cprocnear name		; Set up near proc
 ifdef	__NOU__
 PROC    name NEAR
 else
diff --git a/nasm.txt b/nasm.txt
index cc7fa27b..950c361a 100644
--- a/nasm.txt
+++ b/nasm.txt
@@ -75,7 +75,7 @@ OPTIONS
 	output is suppressed.
 
 *-MG* 'file'::
-	Same as *-M* but assumes that missing Makefile dependecies are generated
+	Same as *-M* but assumes that missing Makefile dependencies are generated
 	and added to dependency list without a prefix.
 
 *-MF* 'file'::
diff --git a/nasmlib/readnum.c b/nasmlib/readnum.c
index 11c876a8..f2ec20cf 100644
--- a/nasmlib/readnum.c
+++ b/nasmlib/readnum.c
@@ -1,5 +1,5 @@
 /* ----------------------------------------------------------------------- *
- *   
+ *
  *   Copyright 1996-2016 The NASM Authors - All Rights Reserved
  *   See the file AUTHORS included with the NASM distribution for
  *   the specific copyright holders.
@@ -14,7 +14,7 @@
  *     copyright notice, this list of conditions and the following
  *     disclaimer in the documentation and/or other materials provided
  *     with the distribution.
- *     
+ *
  *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
@@ -82,7 +82,7 @@ int64_t readnum(const char *str, bool *error)
 
     /*
      * If the number came from make_tok_num (as a result of an %assign), it
-     * might have a '-' built into it (rather than in a preceeding token).
+     * might have a '-' built into it (rather than in a preceding token).
      */
     if (*r == '-') {
         r++;
diff --git a/nasmlib/realpath.c b/nasmlib/realpath.c
index c31003e3..eaa148a1 100644
--- a/nasmlib/realpath.c
+++ b/nasmlib/realpath.c
@@ -72,7 +72,7 @@ char *nasm_realpath(const char *rel_path)
 
     rp = realpath(rel_path, NULL);
 
-    /* Not all implemetations of realpath() support a NULL second argument */
+    /* Not all implementations of realpath() support a NULL second argument */
     if (!rp && errno == EINVAL) {
         long path_max = -1;
         char *rp;
diff --git a/nsis/NASMMultiUser.nsh b/nsis/NASMMultiUser.nsh
index a5dc3a4a..9596dd7f 100755
--- a/nsis/NASMMultiUser.nsh
+++ b/nsis/NASMMultiUser.nsh
@@ -192,11 +192,11 @@ Installer/uninstaller initialization
 !macro MULTIUSER_INIT_TEXTS
 
   !ifndef MULTIUSER_INIT_TEXT_ADMINREQUIRED
-    !define MULTIUSER_INIT_TEXT_ADMINREQUIRED "$(^Caption) requires Administrator priviledges."
+    !define MULTIUSER_INIT_TEXT_ADMINREQUIRED "$(^Caption) requires Administrator privileges."
   !endif
 
   !ifndef MULTIUSER_INIT_TEXT_POWERREQUIRED
-    !define MULTIUSER_INIT_TEXT_POWERREQUIRED "$(^Caption) requires at least Power User priviledges."
+    !define MULTIUSER_INIT_TEXT_POWERREQUIRED "$(^Caption) requires at least Power User privileges."
   !endif
 
   !ifndef MULTIUSER_INIT_TEXT_ALLUSERSNOTPOSSIBLE
diff --git a/output/codeview.c b/output/codeview.c
index 30065822..d1011fcb 100644
--- a/output/codeview.c
+++ b/output/codeview.c
@@ -751,7 +751,7 @@ static void write_symbolinfo_table(struct coff_Section *const sect)
     section_write32(sect, 0x000000F1);
     section_write32(sect, field_length);
 
-    /* for sub fields, length preceeds type */
+    /* for sub fields, length proceeds type */
 
     out_len = write_symbolinfo_obj(sect);
     nasm_assert(out_len == obj_length);
diff --git a/output/dwarf.h b/output/dwarf.h
index f846b2be..87bc0c85 100644
--- a/output/dwarf.h
+++ b/output/dwarf.h
@@ -35,7 +35,7 @@
 #define OUTPUT_DWARF_H
 
 /*
- * based on DWARF 3 standart
+ * based on DWARF 3 standard
  */
 
 enum dwarf_tag {
diff --git a/output/elf.h b/output/elf.h
index 8b83c5c2..a15688ed 100644
--- a/output/elf.h
+++ b/output/elf.h
@@ -88,9 +88,9 @@
 #define EM_X86_64	62
 #define EM_CRIS		76
 #define EM_V850		87
-#define EM_ALPHA	0x9026	/* Interrim Alpha that stuck around */
+#define EM_ALPHA	0x9026	/* Interim Alpha that stuck around */
 #define EM_CYGNUS_V850	0x9080	/* Old v850 ID used by Cygnus */
-#define EM_S390_OLD	0xA390	/* Obsolete interrim value for S/390 */
+#define EM_S390_OLD	0xA390	/* Obsolete interim value for S/390 */
 
 /* Dynamic type values */
 #define DT_NULL		0
@@ -120,7 +120,7 @@
 #define DT_LOPROC	0x70000000
 #define DT_HIPROC	0x7fffffff
 
-/* Auxilliary table entries */
+/* Auxiliary table entries */
 #define AT_NULL		0	/* end of vector */
 #define AT_IGNORE	1	/* entry should be ignored */
 #define AT_EXECFD	2	/* file descriptor of program */
@@ -205,7 +205,7 @@
 /* Section align flag */
 #define SHA_ANY		1	/* No alignment constraint */
 
-/* Lenght of magic at the start of a file */
+/* Length of magic at the start of a file */
 #define EI_NIDENT	16
 
 /* Magic number constants... */
diff --git a/output/outbin.c b/output/outbin.c
index 2ceec7d1..1522e5cb 100644
--- a/output/outbin.c
+++ b/output/outbin.c
@@ -1,5 +1,5 @@
 /* ----------------------------------------------------------------------- *
- *   
+ *
  *   Copyright 1996-2017 The NASM Authors - All Rights Reserved
  *   See the file AUTHORS included with the NASM distribution for
  *   the specific copyright holders.
@@ -14,7 +14,7 @@
  *     copyright notice, this list of conditions and the following
  *     disclaimer in the documentation and/or other materials provided
  *     with the distribution.
- *     
+ *
  *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
@@ -31,7 +31,7 @@
  *
  * ----------------------------------------------------------------------- */
 
-/* 
+/*
  * outbin.c output routines for the Netwide Assembler to produce
  *    flat-form binary files
  */
@@ -48,7 +48,7 @@
  *
  * - Sections can be either progbits or nobits type.
  *
- * - You can specify that they be aligned at a certian boundary
+ * - You can specify that they be aligned at a certain boundary
  *   following the previous section ("align="), or positioned at an
  *   arbitrary byte-granular location ("start=").
  *
@@ -1300,7 +1300,7 @@ bin_directive(enum directive directive, char *args)
     /* The 'map' directive allows the user to generate section
      * and symbol information to stdout, stderr, or to a file. */
 	char *p;
-	
+
         if (!pass_first())
             return DIRR_OK;
         args += strspn(args, " \t");
@@ -1363,8 +1363,8 @@ static void ith_init(void)
 {
     do_output = do_output_ith;
     binfmt_init();
-}    
-    
+}
+
 static void srec_init(void)
 {
     do_output = do_output_srec;
@@ -1410,7 +1410,7 @@ static void do_output_bin(void)
 
         /* Write the section to the output file. */
 	saa_fpwrite(s->contents, ofile);
-        
+
 	/* Keep track of the current file position */
 	addr = s->start + s->length;
     }
diff --git a/output/outcoff.c b/output/outcoff.c
index e505fe60..1a70616a 100644
--- a/output/outcoff.c
+++ b/output/outcoff.c
@@ -506,7 +506,7 @@ static int32_t coff_section_names(char *name, int *bits)
             if (comdat_selection == IMAGE_COMDAT_SELECT_ASSOCIATIVE) {
                 /*
                  * Find an existing section with given comdat name
-                 */ 
+                 */
                 for (j = 0; j < coff_nsects; j++)
                     if (coff_sects[j]->comdat_name &&
                         !strcmp(coff_sects[j]->comdat_name, comdat_name))
@@ -518,7 +518,7 @@ static int32_t coff_section_names(char *name, int *bits)
                      * Even though the specs don't enforce a particular order,
                      * VS (2019) linker doesn't accept .obj files where the
                      * target section is a later one (than the one with sel==5)
-                     * 
+                     *
                      * So let's insert another section now (a placeholder),
                      * hoping it will be turned into the target section later.
                      */
@@ -980,7 +980,7 @@ coff_directives(enum directive directive, char *value)
 
                 if (equals) {
                     /*
-                     * this value arithmetics effectively reflects
+                     * this value arithmetic effectively reflects
                      * initsym in coff_write(): 2 for file, 1 for
                      * .absolute and two per each section
                      */
diff --git a/output/outelf.c b/output/outelf.c
index f47728ed..d71cb499 100644
--- a/output/outelf.c
+++ b/output/outelf.c
@@ -2099,7 +2099,7 @@ static void elf_sym(const struct elf_symbol *sym)
 
     /*
      * Careful here. This relies on sym->section being signed; for
-     * special section indicies this value needs to be cast to
+     * special section indices this value needs to be cast to
      * (int16_t) so that it sign-extends, however, here SHN_LORESERVE
      * is used as an unsigned constant.
      */
@@ -3492,7 +3492,7 @@ static void dwarf_generate(void)
     saa_rnbytes(plines, pbuf, saalen);   /* read a given no. of bytes */
     pbuf += linepoff;
     saa_free(plines);
-    /* concatonate line program ranges */
+    /* concatenate line program ranges */
     linepoff += 13;
     plinesrel = saa_init(1L);
     psect = dwarf_fsect;
diff --git a/output/outelf.h b/output/outelf.h
index 7443dffc..fcb91db5 100644
--- a/output/outelf.h
+++ b/output/outelf.h
@@ -50,7 +50,7 @@
 #define TY_DEBUGSYMLIN 0x40     /* internal call to debug_out */
 
 /*
- * Debugging ELF sections (section indicies starting with sec_debug)
+ * Debugging ELF sections (section indices starting with sec_debug)
  */
 
 /* stabs */
diff --git a/output/outieee.c b/output/outieee.c
index b3ccc5f6..878a17a4 100644
--- a/output/outieee.c
+++ b/output/outieee.c
@@ -406,7 +406,7 @@ static void ieee_out(int32_t segto, const void *data,
     }
 
     /*
-     * Find the segment we are targetting.
+     * Find the segment we are targeting.
      */
     for (seg = seghead; seg; seg = seg->next)
         if (seg->index == segto)
@@ -1210,7 +1210,7 @@ static int32_t ieee_putlr(struct ieeeFixupp *p)
  * defines two types of segments: absolute and virtual.  Note that
  * 'absolute' in this context is a different thing from the IEEE
  * definition of an absolute segment type, which is also supported. If a
- * sement is linked in virtual mode the low limit (L-var) is
+ * segment is linked in virtual mode the low limit (L-var) is
  * subtracted from each R,X, and P variable which appears in an
  * expression, so that we can have relative offsets.  Meanwhile
  * in the ABSOLUTE mode this subtraction is not done and
@@ -1321,7 +1321,7 @@ static void dbgls_cleanup(void)
  * because this routine is not bracketed in
  * the main program, this routine will be called even if there
  * is no request for debug info
- * so, we have to make sure the ??LINE segment is avaialbe
+ * so, we have to make sure the ??LINE segment is available
  * as the first segment when this debug format is selected
  */
 static void dbgls_linnum(const char *lnfname, int32_t lineno, int32_t segto)
@@ -1343,7 +1343,7 @@ static void dbgls_linnum(const char *lnfname, int32_t lineno, int32_t segto)
     }
 
     /*
-     * Find the segment we are targetting.
+     * Find the segment we are targeting.
      */
     for (seg = seghead; seg; seg = seg->next)
         if (seg->index == segto)
diff --git a/output/outmacho.c b/output/outmacho.c
index d041df64..1e776f52 100644
--- a/output/outmacho.c
+++ b/output/outmacho.c
@@ -1604,7 +1604,7 @@ static void macho_write (void)
     **   uint32_t in-file offset
     **   uint32_t alignment
     **    (irrelevant in MH_OBJECT)
-    **   uint32_t in-file offset of relocation entires
+    **   uint32_t in-file offset of relocation entries
     **   uint32_t number of relocations
     **   uint32_t flags
     **   uint32_t reserved
diff --git a/output/outobj.c b/output/outobj.c
index 1ba650d1..281839d0 100644
--- a/output/outobj.c
+++ b/output/outobj.c
@@ -64,7 +64,7 @@
  */
 
 /*
- * These routines are built around the ObjRecord data struture.  An ObjRecord
+ * These routines are built around the ObjRecord data structure.  An ObjRecord
  * holds an object file record that may be under construction or complete.
  *
  * A major function of these routines is to support continuation of an obj
@@ -199,7 +199,7 @@ static ObjRecord *obj_clear(ObjRecord * orp)
 
 /*
  * Emit an ObjRecord structure.  (Never reallocates).
- * The record is written out preceeded (recursively) by its previous part (if
+ * The record is written out proceeded (recursively) by its previous part (if
  * any) and followed (recursively) by its child (if any).
  * The previous part and the child are freed.  The main ObjRecord is cleared,
  * not freed.
@@ -246,7 +246,7 @@ static ObjRecord *obj_new(void)
 /*
  * Advance to the next record because the existing one is full or its x_size
  * is incompatible.
- * Any uncommited data is moved into the next record.
+ * Any uncommitted data is moved into the next record.
  */
 static ObjRecord *obj_bump(ObjRecord * orp)
 {
@@ -294,7 +294,7 @@ static ObjRecord *obj_check(ObjRecord * orp, int size)
 }
 
 /*
- * All data written so far is commited to the current record (won't be moved to
+ * All data written so far is committed to the current record (won't be moved to
  * the next record in case of continuation).
  */
 static ObjRecord *obj_commit(ObjRecord * orp)
@@ -1037,7 +1037,7 @@ static void obj_out(int32_t segto, const void *data,
     }
 
     /*
-     * Find the segment we are targetting.
+     * Find the segment we are targeting.
      */
     for (seg = seghead; seg; seg = seg->next)
         if (seg->index == segto)
@@ -2510,7 +2510,7 @@ static void dbgbi_linnum(const char *lnfname, int32_t lineno, int32_t segto)
     }
 
     /*
-     * Find the segment we are targetting.
+     * Find the segment we are targeting.
      */
     for (seg = seghead; seg; seg = seg->next)
         if (seg->index == segto)
diff --git a/output/outrdf2.c b/output/outrdf2.c
index d020d91e..b05e836a 100644
--- a/output/outrdf2.c
+++ b/output/outrdf2.c
@@ -1,5 +1,5 @@
 /* ----------------------------------------------------------------------- *
- *   
+ *
  *   Copyright 1996-2016 The NASM Authors - All Rights Reserved
  *   See the file AUTHORS included with the NASM distribution for
  *   the specific copyright holders.
@@ -14,7 +14,7 @@
  *     copyright notice, this list of conditions and the following
  *     disclaimer in the documentation and/or other materials provided
  *     with the distribution.
- *     
+ *
  *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
@@ -85,7 +85,7 @@ static int segmenttypenumbers[COUNT_SEGTYPES] = {
                                  * on 80x86 machines for efficiency */
 
 /***********************************************************************
- * Actual code to deal with RDOFF2 ouput format begins here...
+ * Actual code to deal with RDOFF2 output format begins here...
  */
 
 /* global variables set during the initialisation phase */
@@ -556,7 +556,7 @@ static void rdf2_out(int32_t segto, const void *data,
     }
 
     if (type == OUT_RESERVE) {
-        if (segto == 2)         /* BSS segment space reserverd */
+        if (segto == 2)         /* BSS segment space reserved */
             bsslength += size;
         else
             while (size--)
@@ -718,7 +718,7 @@ rdf2_directive(enum directive directive, char *value)
             write_dll_rec(&r);
         }
         return DIRR_OK;
-	
+
     case D_MODULE:
 	if ((n = strlen(value)) >= MODLIB_NAME_MAX) {
 	    nasm_error(ERR_NONFATAL, "name size exceeds %d bytes", MODLIB_NAME_MAX);
diff --git a/perllib/phash.ph b/perllib/phash.ph
index 693909b8..b5e4411a 100644
--- a/perllib/phash.ph
+++ b/perllib/phash.ph
@@ -102,7 +102,7 @@ sub gen_hash_n($$$$) {
     # Now we need to assign values to each vertex, so that for each
     # edge, the sum of the values for the two vertices give the value
     # for the edge (which is our hash index.)  If we find an impossible
-    # sitation, the graph was cyclic.
+    # situation, the graph was cyclic.
     @nodeval = (undef) x $gsize;
 
     for ($i = 0; $i < $gsize; $i++) {
diff --git a/rdoff/README b/rdoff/README
index c0b1c2cd..56c0f834 100644
--- a/rdoff/README
+++ b/rdoff/README
@@ -137,7 +137,7 @@ but accept them gracefully, and read them byte for byte into
 a 'generic record' (see the definition of GenericRec in 'rdoff.h').
 
 If you are using these functions to write RDF modules (rather than
-just reading them), then please note the existance of a new function
+just reading them), then please note the existence of a new function
 'rdfaddsegment(rdf_headerbuf,long)'. This must be called once for
 each segment in your object, to tell the header writing functions
 how long the segment is.
@@ -172,7 +172,7 @@ There are still various things unimplemented that we would like to add.
 If you want to find out what these are, search near the top of each *.c
 file for a comment containing the word 'TODO'. A brief list is given here:
 
-- Improve the performace of ldrdf (there are several enhancements I can think
+- Improve the performance of ldrdf (there are several enhancements I can think
   of that wouldn't be too hard to add)
 - Stop assuming that we're on a little endian machine
 - Check for more bugs
diff --git a/rdoff/doc/rdoff.texi b/rdoff/doc/rdoff.texi
index 8ba2c684..bd14e48d 100644
--- a/rdoff/doc/rdoff.texi
+++ b/rdoff/doc/rdoff.texi
@@ -50,7 +50,7 @@ RDOFF module consists of three parts:
 
 @itemize
 @item Master header
-@item Header (may be omited)
+@item Header (may be omitted)
 @item Sections
 @end itemize
 
diff --git a/rdoff/ldsegs.h b/rdoff/ldsegs.h
index 7dccaace..d32df92a 100644
--- a/rdoff/ldsegs.h
+++ b/rdoff/ldsegs.h
@@ -32,7 +32,7 @@ struct segconfig sconft[SEGCONFIGMAX] = {
     {0x0006, 0x0007, "debug information", 2, 0},
     {0x0008, 0x001F, "reserved(general extensions)", 1, 0},
     {0x0020, 0x0FFF, "reserved(MOSCOW)", 1, 0},
-    {0x1000, 0x7FFF, "reserved(system dependant)", 1, 0},
+    {0x1000, 0x7FFF, "reserved(system dependent)", 1, 0},
     {0x8000, 0xFFFE, "reserved(other)", 1, 0},
     {0xFFFF, 0xFFFF, "invalid segment", 0, 0}
 };
diff --git a/rdoff/rdoff.c b/rdoff/rdoff.c
index 3057f84f..068b9d65 100644
--- a/rdoff/rdoff.c
+++ b/rdoff/rdoff.c
@@ -197,7 +197,7 @@ char *translatesegmenttype(uint16_t type)
     if (type < 0x1000)
         return "reserved - Moscow";
     if (type < 0x8000)
-        return "reserved - system dependant";
+        return "reserved - system dependent";
     if (type < 0xFFFF)
         return "reserved - other";
     if (type == 0xFFFF)
diff --git a/rdoff/test/rdtlib.asm b/rdoff/test/rdtlib.asm
index 6c2b8ec9..d20995b2 100644
--- a/rdoff/test/rdtlib.asm
+++ b/rdoff/test/rdtlib.asm
@@ -10,7 +10,7 @@ _strcmp:
 	push ebp
 	mov ebp,esp
 
-	;; ebp+8 = first paramater, ebp+12 = second
+	;; ebp+8 = first parameter, ebp+12 = second
 
 	mov esi,[ebp+8]
 	mov edi,[ebp+12]
@@ -27,11 +27,11 @@ _strcmp:
 	inc edi
 	jmp .loop
 
-.below:	
+.below:
 	mov eax,-1
 	pop ebp
 	ret
-	
+
 .above:
 	mov eax,1
 	pop ebp
@@ -45,4 +45,4 @@ _strcmp:
 [SECTION .data]
 [GLOBAL _message]
 
-_message:	db 'hello',0
\ No newline at end of file
+_message:	db 'hello',0
diff --git a/test/changed.asm b/test/changed.asm
index 7ea2cc4d..853e01cd 100644
--- a/test/changed.asm
+++ b/test/changed.asm
@@ -195,7 +195,7 @@ push %1			;
 ; To support other types of macros that extend the definition of instructions,
 ; I disabled the warning on a multi-line macro called with the wrong number of
 ; parameters.  PUSH and POP can be extended equally well by either method, but
-; other intruction extensions may need one method or the other, so I made both
+; other instruction extensions may need one method or the other, so I made both
 ; work.
 ;
 ; Note that neither of these warnings was really needed, because a later stage
@@ -306,17 +306,17 @@ arg_example2 arg2
 ;
 	sqrtps xmm0,[ebx+10]	; SSE opcode
 	paddsiw mm0,[ebx+10]	; Cyrix opcode with the same byte seq.
-	
+
 ;-----------------------------------------------------------------------------
 ; Enhancement by hpa in preproc.c
 ;
-; Support %undef to remoce a single-line macro
+; Support %undef to remove a single-line macro
 ;
 %define	TEST_ME 42
 %ifndef TEST_ME
 %error	"TEST_ME not defined after %define"
 %endif
-			
+
 %undef  TEST_ME
 %ifdef  TEST_ME
 %error	"TEST_ME defined after %undef"
@@ -331,7 +331,7 @@ arg_example2 arg2
 	pshufw mm2, mm1, 3
 	pshufw mm3,[ebx],2
 	pshufw mm7,[0+edi*8],1
-	
+
 	pshufw mm2, mm1, byte 3
 	pshufw mm3,[ebx],byte 2
 	pshufw mm7,[0+edi*8],byte 1
@@ -349,9 +349,9 @@ arg_example2 arg2
 	pinsrw mm1, [esi], byte 1
 	pinsrw mm1, word [esi], byte 1
 
-	
+
 %endif				; oldmsg
-	
+
 %ifdef oldcrash  ;*************************************************************
 
 This_label_is_256_characters_long__There_used_to_be_a_bug_in_stdscan_which_made_it_crash_when_it_did_a_keyword_search_on_any_label_longer_than_255_characters__Now_anything_longer_than_MAX_KEYWORD_is_always_a_symbol__It_will_not_even_try_a_keyword_search___
diff --git a/test/nullfile.asm b/test/nullfile.asm
index 83e306e0..174d8821 100644
--- a/test/nullfile.asm
+++ b/test/nullfile.asm
@@ -1,4 +1,4 @@
 ;Testname=test; Arguments=-fbin -onull.bin; Files=stdout stderr null.bin
 ;
-; A file that produces no output has been known to occationally crash NASM.
+; A file that produces no output has been known to occasionally crash NASM.
 ;
diff --git a/test/performtest.pl b/test/performtest.pl
index f7865b39..46b1bdfa 100755
--- a/test/performtest.pl
+++ b/test/performtest.pl
@@ -180,7 +180,7 @@ with "golden" output files.
     testname should ideally describe the arguments, eg. unoptimized for -O0.
     arguments can be an optimization level (-O), an output format (-f),
     an output file specifier (-o) etc.
-    The output files should be a space seperated list of files that will
+    The output files should be a space separated list of files that will
     be checked for regressions. This should often be the output file
     and the special files stdout and stderr.
 
diff --git a/tools/mkdep.pl b/tools/mkdep.pl
index 27342c7f..f7cc349f 100755
--- a/tools/mkdep.pl
+++ b/tools/mkdep.pl
@@ -283,7 +283,7 @@ while ( defined(my $arg = shift(@ARGV)) ) {
     } elsif ( $arg eq '-d' ) {
 	$debug++;
     } elsif ( $arg eq '-M' ) {
-	$mkmode = 1;		# Futher filenames are output Makefile names
+	$mkmode = 1;		# Further filenames are output Makefile names
     } elsif ( $arg eq '--' && $mkmode ) {
 	$mkmode = 0;
     } elsif ( $arg =~ /^-/ ) {
diff --git a/tools/syncfiles.pl b/tools/syncfiles.pl
index 38524a82..eb26484e 100755
--- a/tools/syncfiles.pl
+++ b/tools/syncfiles.pl
@@ -50,7 +50,7 @@ sub do_transform($$) {
     $l =~ s/\x03/$$h{'continuation'}/g;
 
     if ($ps eq '') {
-	# Remove the path separator and the preceeding directory
+	# Remove the path separator and the preceding directory
 	$l =~ s/[^\s\=]*\x02//g;
     } else {
 	# Convert the path separator
diff --git a/travis/test/movimm.json b/travis/test/movimm.json
index 7c2b33d6..5a0d0f1a 100644
--- a/travis/test/movimm.json
+++ b/travis/test/movimm.json
@@ -1,6 +1,6 @@
 [
 	{
-		"description": "Test mov imm intruction (-Ox)",
+		"description": "Test mov imm instruction (-Ox)",
 		"id": "movimm",
 		"format": "bin",
 		"source": "movimm.asm",
@@ -11,7 +11,7 @@
 		]
 	},
 	{
-		"description": "Test mov imm intruction (-O0)",
+		"description": "Test mov imm instruction (-O0)",
 		"ref": "movimm",
 		"option": "-O0",
 		"target": [
diff --git a/travis/test/null.asm b/travis/test/null.asm
index 338d7101..6a8746f3 100644
--- a/travis/test/null.asm
+++ b/travis/test/null.asm
@@ -1,3 +1,3 @@
 ;
-; A file that produces no output has been known to occationally crash NASM.
+; A file that produces no output has been known to occasionally crash NASM.
 ;
diff --git a/travis/test/nullfile.asm b/travis/test/nullfile.asm
index 338d7101..6a8746f3 100644
--- a/travis/test/nullfile.asm
+++ b/travis/test/nullfile.asm
@@ -1,3 +1,3 @@
 ;
-; A file that produces no output has been known to occationally crash NASM.
+; A file that produces no output has been known to occasionally crash NASM.
 ;
diff --git a/x86/iflags.ph b/x86/iflags.ph
index 7a1e13f5..0ef37cac 100644
--- a/x86/iflags.ph
+++ b/x86/iflags.ph
@@ -131,6 +131,6 @@ if_("IA64",              "IA64 (in x86 mode)");
 # Must be the last CPU definition
 if_("ANY",               "Any x86 CPU");
 
-# These must come after the CPU defitions proper
+# These must come after the CPU definitions proper
 if_("CYRIX",             "Cyrix-specific");
 if_("AMD",               "AMD-specific");
diff --git a/x86/insns-iflags.ph b/x86/insns-iflags.ph
index a539974b..8b4aa2ad 100644
--- a/x86/insns-iflags.ph
+++ b/x86/insns-iflags.ph
@@ -108,7 +108,7 @@ sub if_end() {
     $iflag_words = $n_iflags >> 5;
 }
 
-# The actual flags defintions
+# The actual flags definitions
 require 'x86/iflags.ph';
 if_end();