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character-sets × 9history × 3
keyboards × 2
commodore-pet × 2
ascii × 2
commodore-64 × 1
ms-dos × 1
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design-choices × 1
text × 1
early-computer × 1
punched-cards × 1
binary-coded-decimal × 1
biquinary × 1
teletype × 1
algol × 1
paper-tape × 1
petscii × 1
