Proper noun
PETSCII
(computing, historical) The character set used by the Commodore PET and related computers.
As with the Atari's ATASCII art, C-64 fans developed a similar scene that used PETSCII for their creations. Source: Internet
The Commodore 64 PETSCII scene did not make the transition to the Commodore Amiga as the C64 demo and warez scenes did. Source: Internet
The PETSCII code Commodore International used for their 8-bit systems is probably unique among post-1970 codes in being based on ASCII-1963, instead of the more common ASCII-1967, such as found on the ZX Spectrum computer. Source: Internet