PETSCII en · PROPN
Etymology
Blend of PET + ASCII.
Meanings
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(historical) The character set used by the Commodore PET and related computers.
Why is the order of graphical characters in the PETSCII table so seemingly haphazard? The answer is that arrangement was dictated by the PET keyboard design, a hardware-driven decision.
2014, Nick Montfort et al., 10 PRINT CHR$(205.5+RND(1)); : GOTO 10, MIT Press, →ISBN, page 225: