A Bit

1. (mathematics, computing) A binary digit, generally represented as a 1 or 0.
2. (computing) The smallest unit of storage in a digital computer, consisting of a binary digit.Synonym: b
3. (information theory, cryptography) Any datum that may take on one of exactly two values.
4. (information theory) A unit of measure for information entropy.
5. A microbitcoin, or a millionth of a bitcoin (0.000001 BTC).