Number System Entirely Comprising Ones and Zeroes

This page is the CodyCross answer for the clue below from A Sweet Life, Group 1099, Puzzle 3 (Tangerines).

Question is: Number System Entirely Comprising Ones and Zeroes

and the answer is: BINARY

Word Meaning:

BINARY — Being in one of two mutually exclusive states.

Definitions from Wiktionary.