Questions tagged [apl]
For questions involving the early programming language APL, which used a large number of special graphical symbols.
5
questions
8
votes
1
answer
325
views
Was ∆ used in APL as a substitute for space because ECMA-17/ISO 2047 specified △ as graphical representation for space?
Wikipedia on naming conventions in programming states (without source):
In APL dialects, the delta (Δ) is used between words, e.g. PERFΔSQUARE (…)
This is an unusual choice, but I notice that ECMA-...
- 668
17
votes
1
answer
593
views
When was an image of an apple first used to promote the APL language
The APL community is contemplating the adoption of a common logo but some are worried about trouble from Apple lawyers. Now, IBM and others have been using apple motifs in promoting APL for a long ...
- 668
6
votes
4
answers
606
views
What monitor could render APL2 characters in 1985?
BACKGROUND:
In 1985, I took an evening class in APL at the local IBM as part of a high school Explorer Post (which was really cool, these guys giving up their time to teach us programming). Other ...
- 413
8
votes
4
answers
789
views
How was the APL character set represented on IBM mainframes?
The APL language used a unique set of characters, and additionally allowed overstriking of some characters on the terminal to form characters that were used in the language. When an APL workspace was ...
- 1,603
1
vote
1
answer
142
views
Overstriking for APL on 3270s?
This question addressed the question of APL overstrikes on printing terminals. However, IBM also had 3270 video display terminals that supported APL, as well, and those, too, handled overstriking. How?...
- 1,603