Questions tagged [apl]
For questions involving the early programming language APL, which used a large number of special graphical symbols.
7 questions
2
votes
0
answers
192
views
What was the complete list of overstrikes supported by Multics APL?
APL famously has a lot of "characters" that are really two other characters overstruck. I was surprised to read in this Multics APL manual from 1985 that this extended even to overstriking F ...
- 936
9
votes
0
answers
379
views
Looking for Pascal Source for APL Interpreter
There exists an APL interpreter written in CDC Pascal, which source was published in The BYTE Book of Pascal. Multiple scanned copies of the book in PDF form can be found online, some pretending to ...
- 22.2k
8
votes
1
answer
391
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-...
- 788
22
votes
2
answers
985
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 ...
- 788
6
votes
4
answers
689
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
897
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 ...
- 2,083
1
vote
1
answer
178
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?...
- 2,083