@table @samp
@item [:ascii:]
-This matches any ASCII (unibyte) character.
+This matches any @sc{ascii} (unibyte) character.
@item [:alnum:]
This matches any letter or digit. (At present, for multibyte
characters, it matches anything that has word syntax.)
@item [:blank:]
This matches space and tab only.
@item [:cntrl:]
-This matches any ASCII control character.
+This matches any @sc{ascii} control character.
@item [:digit:]
This matches @samp{0} through @samp{9}. Thus, @samp{[-+[:digit:]]}
matches any digit, as well as @samp{+} and @samp{-}.
@item [:graph:]
-This matches graphic characters---everything except ASCII control characters,
+This matches graphic characters---everything except @sc{ascii} control characters,
space, and DEL.
@item [:lower:]
This matches any lower-case letter, as determined by
the current case table (@pxref{Case Tables}).
@item [:nonascii:]
-This matches any non-ASCII (multibyte) character.
+This matches any non-@sc{ascii} (multibyte) character.
@item [:print:]
-This matches printing characters---everything except ASCII control
-characters and DEL.
+This matches printing characters---everything except @sc{ascii} control
+characters and the delete character.
@item [:punct:]
This matches any punctuation character. (At present, for multibyte
characters, it matches anything that has non-word syntax.)