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About: IBM 101

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The IBM 101 Electronic Statistical Machine, introduced in 1952, combines in one unit the functions of sorting, counting, accumulating, balancing, editing, and printing of summaries of facts recorded in IBM cards. The 101 could sort cards based on multiple columns. For example, if a card had multiple 3-column test scores, the 101 could be wired to sort into pocket 0 those cards with no scores over 090, into pocket 1 those with one score over 090, and so on; logic limited only by the number of relays available.

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  • The IBM 101 Electronic Statistical Machine, introduced in 1952, combines in one unit the functions of sorting, counting, accumulating, balancing, editing, and printing of summaries of facts recorded in IBM cards. The 101 could sort cards based on multiple columns. For example, if a card had multiple 3-column test scores, the 101 could be wired to sort into pocket 0 those cards with no scores over 090, into pocket 1 those with one score over 090, and so on; logic limited only by the number of relays available. A. Ross Eckler suggests the development of the 101, with functions similar to earlier multicolumn sorters and unit counters developed by the Census Bureau, "was apparently a direct result of the transfer to IBM of Lawrence Wilson, who had served as chief of the Census Bureau's Machine Tabulation Division". (en)
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  • The IBM 101 Electronic Statistical Machine, introduced in 1952, combines in one unit the functions of sorting, counting, accumulating, balancing, editing, and printing of summaries of facts recorded in IBM cards. The 101 could sort cards based on multiple columns. For example, if a card had multiple 3-column test scores, the 101 could be wired to sort into pocket 0 those cards with no scores over 090, into pocket 1 those with one score over 090, and so on; logic limited only by the number of relays available. (en)
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  • IBM 101 (en)
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