Bit

An abbreviation for binary digit and is the smallest unit of data in a computer. Bits have a single binary value, 1 or 0, and these settings can be implemented as logical values (true or false) or as a switch (on or off).

Computers generally store data and execute instructions in bit multiples called bytes. There are eight bits in a byte.

Note: In some systems, the term octet is used for an eight-bit unit instead of byte.