Crossword Genius

Using only ones and zeros (6)

Ross

I believe the answer is:

binary

'using only ones and zeros' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for binary that I've seen before include "Double (star)" , "Base-2 system" , "Two-star system" , "Twofold" , "Involving two things" .)

I've seen this clue in the LA Times.
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