tabulator

noun4

1. •
   A person who counts or tabulates things.
2. •
   The mechanism on a typewriter that sets the position of columns and borders.
3. •
   A tab character.

   • You can put a tabulator in all those places where a space is allowed. A tabulator character corresponds to, for example, 4 spaces in the program editor. — 2004
4. •
   (historical) An early data processing machine that produces printed lists and totals from data on punched cards.