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IBM System/3

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The IBM System/3 was was a low-end business computer introduced in the early 1970s and aimed at organizations that still used unit record equipment. It featured a new punch card format that was smaller and stored 96 characters. Instead of the rectangular punches in the classic IBM card, the new cards had small, circular holes much like paper tape. Data was stored in EBCDIC code. Low-end IBM System 370s could also read the new cards.

The System/3 also used a single-platter cartridge disk roughly the size of a medium pizza.

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