-Note that Perl can be compiled and run under EBCDIC (See L<perlebcdic>)
-or ASCII. Most of the documentation (and even comments in the code)
+The non-ASCII characters below 256 can have various meanings, depending on
+various things. (See, most notably, L<perllocale>.) But usually the whole
+range can be referred to as ISO-8859-1. Often, the term "Latin-1" (or
+"Latin1") is used as an equivalent for ISO-8859-1. But some people treat
+"Latin1" as referring just to the characters in the range 128 through 255, or
+somethimes from 160 through 255.
+This documentation uses "Latin1" and "Latin-1" to refer to all 256 characters.
+
+Note that Perl can be compiled and run under either ASCII or EBCDIC (See
+L<perlebcdic>). Most of the documentation (and even comments in the code)