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Also note the keyboard had some 55 unique (68 listed per tables above, including comparative symbols but several symbols appear in both monadic and dyadic tables) APL symbol keys (55 APL functions (operators) are listed in IBM's 5110 APL Reference Manual), thus with the use of alt, shift and ctrl keys - it would theoretically have allowed a ...
The programming language APL uses a number of symbols, rather than words from natural language, to identify operations, similarly to mathematical symbols.Prior to the wide adoption of Unicode, a number of special-purpose EBCDIC and non-EBCDIC code pages were used to represent the symbols required for writing APL.
Many APL symbols, even with the APL characters on the Selectric typing element, still had to be typed in by over-striking two extant element characters. An example is the grade up character, which had to be made from a delta (shift-H) and a Sheffer stroke (shift-M).
The APL Character Set for Workspace Interchange, registered for use with ISO/IEC 2022 as ISO-IR-68, [1] is a character set developed by the APL Working Group of the Canadian Standards Association. [2]
APL syntax and symbols; C. Code page 293; Code page 310; Code page 351; D. Digital encoding of APL symbols; Direct function; E. ELI (programming language) I. ISO-IR-68;
Miscellaneous Technical is a Unicode block ranging from U+2300 to U+23FF. It contains various common symbols which are related to and used in the various technical, programming language, and academic professions.
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The company aimed WS-1 at users of APL, a programming language that uses graphic symbols to represent most functions and operators. [1] To this end, the WS-1's 70-key QWERTY keyboard includes a second layer with APL symbols, activated via a function key actuated in tandem with the desired symbol. [6]