nLab
binary digit

A binary digit, or bit, is either 00 or 11.

The set of binary digits is the boolean domain 𝔹\mathbb{B}.

As a unit of information, a bit is the amount of information needed to specify which of the 22 possibilities a given binary digit is. In natural units, a bit is ln2ln 2.

Created on September 13, 2010 19:14:03 by Toby Bartels (64.89.62.209)