Bit

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Short for binary digit, the smallest unit of information on most digital computers. The term was first used in 1946 by John Tukey, a leading statistician and adviser to five presidents. A single bit can hold only one of two values: 0 or 1. More meaningful information is obtained by combining consecutive bits into larger units. For example, 8 consecutive bits is usually referred to as a "byte". (Half a byte, i.e., 4 bits, is usually called a nybble or nibble).

Webopedia:Bit

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