> Not to mention that you cannot test for uppercase or lowercase like the ASCII `ch >= 'A' && ch <= 'Z'` because they are not contiguous in EBCDIC. A good reaso

> Not to mention that you cannot test for uppercase or lowercase like the ASCII `ch >= 'A' && ch <= 'Z'` because they are not contiguous in EBCDIC. A good reason to use the C RTL. Watch your sorting methods, too. I had a guy over here once totally confused why running his SAS job on the mainframe yielded a different result than the same code running on PC SAS against the same data.