diff --git a/src/cmd/ksh93/data/builtins.c b/src/cmd/ksh93/data/builtins.c
index bc4571045..9fece3acb 100644
--- a/src/cmd/ksh93/data/builtins.c
+++ b/src/cmd/ksh93/data/builtins.c
@@ -682,7 +682,7 @@ const char sh_optgetopts[] =
   "argument, \bgetopts\b places the option argument in the shell "
   "variable \bOPTARG\b. Otherwise \bOPTARG\b is set to \b1\b when the "
   "option is set and \b0\b when the option is unset.]"
-"[+?The \aoptstring\a string consists of alpha-numeric characters, "
+"[+?The \aoptstring\a string consists of alphanumeric characters, "
   "the special characters +, -, ?, :, and <space>, or character groups "
   "enclosed in [...]].  Character groups may be nested in {...}. "
   "Outside of a [...]] group, a single new-line followed by zero or "
diff --git a/src/cmd/ksh93/sh.1 b/src/cmd/ksh93/sh.1
index f5bd3aa2f..9e6e97abf 100644
--- a/src/cmd/ksh93/sh.1
+++ b/src/cmd/ksh93/sh.1
@@ -2615,7 +2615,7 @@ represents the beginning and ending characters of a nested group that
 will be skipped over when counting starting and ending character matches.
 The behavior is unspecified when the first character of a
 .I pattern-pair\^
-is alpha-numeric
+is alphanumeric
 except for the following:
 .PD 0
 .RS
@@ -5111,7 +5111,7 @@ Cursor forward (right) one character.
 (Right arrow) Same as \f3l\fP.
 .TP 10
 [\f2count\fP]\f3w\fP
-Cursor forward one alpha-numeric word.
+Cursor forward one alphanumeric word.
 .TP 10
 [\f2count\fP]\f3W\fP
 Cursor to the beginning of the next word that follows a blank.
@@ -7121,7 +7121,7 @@ shells. At the moment that the \fBposix\fR option is turned on, it also turns
 on \fBletoctal\fR and turns off \fB\-B\fR/\fBbraceexpand\fR; the reverse is
 done when \fBposix\fR is turned back off. (These options can still be
 controlled independently in between.) Furthermore, the \fBposix\fR option
-is automaticaly turned on upon invocation if ksh is invoked as \fBsh\fR
+is automatically turned on upon invocation if ksh is invoked as \fBsh\fR
 or \fBrsh\fR. In that case, or if the option is turned on by
 specifying \fB-o posix\fR on the invocation command line, the invoked shell
 will not set the preset aliases even if interactive, and will not import type
diff --git a/src/cmd/ksh93/sh.memo b/src/cmd/ksh93/sh.memo
index f71234f34..455e97965 100644
--- a/src/cmd/ksh93/sh.memo
+++ b/src/cmd/ksh93/sh.memo
@@ -1222,7 +1222,7 @@ The third type of parameter is a variable.
 As mentioned earlier,
 \f5ksh\fP uses variables whose names
 consist of one or more
-alpha-numeric strings separated by a \fB\s+2.\s-2\fP.
+alphanumeric strings separated by a \fB\s+2.\s-2\fP.
 There is no need to specify the
 .I type
 of a variable in the shell because, by default,
@@ -1872,7 +1872,7 @@ Similarly, \f5[:\fP\fIclass\fP\f5:]\fP matches
 each of the characters in the given \fIclass\fP
 for all the ANSI-C character classes.
 For example, \f5[[:alnum:]_]\fP
-matches any alpha-numeric character or the character
+matches any alphanumeric character or the character
 .BR _ .
 .P
 \f5ksh\fP
diff --git a/src/cmd/ksh93/tests/io.sh b/src/cmd/ksh93/tests/io.sh
index 6fb5b42cf..26554c091 100755
--- a/src/cmd/ksh93/tests/io.sh
+++ b/src/cmd/ksh93/tests/io.sh
@@ -577,7 +577,7 @@ if	[[ -s "$tmp/fdleak.txt" ]]
 then	exec 3>&-
 	err_exit "Open file descriptor leaks out of subshell"
 fi
-# However, it should still survive a shared-state command sustitution if it's not 1 (stdout).
+# However, it should still survive a shared-state command substitution if it's not 1 (stdout).
 redirect 3>&-  # close FD 3 just in case
 : ${ redirect 3>"$tmp/fdshared.txt"; }
 { echo good >&3; } 2>/dev/null