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tabulator

noun

a person or thing that tabulates; specif.,
  1. a device on a typewriter activated by a key (), used to move the carriage a given number of spaces, as in making columns
  2. the key on a computer keyboard that moves the cursor a preset number of spaces (also )
  3. a machine for automatically compiling lists, tabulations, etc. from information encoded on punch cards

See tabulator in American Heritage Dictionary 4

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tabulator

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