APL code page
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The APL code page was used in early implementations of APL on IBM computer systems and terminals. It was an EBCDIC-based character set which replaced many of the characters with the specialized ones needed by the APL programming language. The original mainframe version was IBM code page 293, while a later ASCII-based version was IBM code page 907.
"Classic" APL character sets have only uppercase letters in them (normally presented italicized), though newer ASCII- or Unicode-based sets generally have lowercase available as well, among other characters not part of "purist" APL.
