[Agent-n. from TABULATE v.: see -OR.] One who tabulates, or draws up a table or scheme. b. A machine or apparatus for this purpose; also, an attachment to a typewriter for typing columns of figures.

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1885.  Athenæum, 14 Nov., 639/3. This … means a corresponding increase in the work of the tabulators.

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1892.  Daily News, 6 June, 5/5. It is these cards that are passed through the electrical tabulator, which, by ingenious contrivances, records the answers on a number of dials.

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1901.  Phonetic Jrnl., 28 Sept., 611/1. Mr. F. P. Gorin, inventor of the tabulator bearing his name.

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