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HAKMEM #1533

Open larsbrinkhoff opened 5 years ago

larsbrinkhoff commented 5 years ago

MB; HAKMEM 140

Information from Michael Beeler is that HAKMEM was a plain text file. AI memo 239 from February 1972 says it's version 140. Tape backup records show a MB; HAKMEM 141 dated 1972-03-16.

larsbrinkhoff commented 5 years ago

There are some characters outside ASCII:

How were these represented in the text file? Which printer was used for the hardcopy?

Alexey-Slyusar commented 5 years ago

Iverson notation / APL characters set has a lot of non-ASCII characters and it could be displayed and printed at the time. For example IBM Selectric typewriter interchangeable typing element had all the special APL characters on it.

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It is possible that the similar mechanism was used at MIT for printing such things like HACKMEM. But it is only my guess.

larsbrinkhoff commented 5 years ago

Yes, I think so. There's an AI memo about the Selectric, though it doesn't mention the symbols in HAKMEM. https://dspace.mit.edu/bitstream/handle/1721.1/6167/AIM-164a.pdf

Alexey-Slyusar commented 5 years ago

Lars, thanks for the link!

larsbrinkhoff commented 4 years ago

Original file found on ToTS tape 3100151:

MB; HAKMEM 141, dated 1972-03-16