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The ubiquitous "IBM card" was an 80-column, rectangular-holed punched card measuring seven and three-eights inches by three and a quarter inches. A mainstay of data processing in the early 20th century, the IBM card stored 80 characters per card and typically could be "read" at 133 characters per second.
In contrast, the first tape drive marketed by IBM (the 726 in 1952) operated at 7,500 cps. |
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