Used in computing and mathematics to refer to the base-2 numeral system. Often appears in compounds like 二進法 (binary system) or 二進数 (binary number).
Computers calculate using the binary system.
binary tree
binary number system; base-2
two steps forward, one step back; alternating progress and regression
duodecimal system; base-12 system
From 二 (two) and 進 (advance, progress), referring to the base-2 numeral system. The term is a direct translation of the English 'binary'.