digit or special character ($, %, #, etc.) is represented in binary code. Fortunately, there are only two methods in wide use: EBCDIC and ASCII. IBM's mainframes and midrange systems use EBCDIC.
Version 1.3 of the Apache HTTP Server is the first version which includes a port to a (non-ASCII) mainframe machine which uses the EBCDIC character set as its native codeset. (It is the SIEMENS ...