PETSCII: /pet'skee/ n. obs. [abbreviation of PET ASCII] The
variation (many would say perversion) of the ASCII character set
used by the Commodore Business Machines PET series of personal
computers and the later Commodore C64, C16, C128, and VIC20
machines. The PETSCII set used left-arrow and up-arrow (as in
old-style ASCII) instead of underscore and caret, placed the
unshifted alphabet at positions 65-90, put the shifted alphabet at
positions 193-218, and added graphics characters.