Computer Storage Unit

Bit

A bit is the basic unit of computer storage. It can contain one of two values, zero or one.

Byte

A byte is 8 bits, and on most computers it is the smallest convenient chunk of storage. 
  • For example, most computers don’t have an instruction to move a bit but do have one to move a byte

Word

A word is generally made up of one or more bytes. 
  • For example, a computer may have instructions to move 64-bit (8-byte) words.

KiloByte

  • 1024 Bytes

MegaByte

  • (1024)^2 Bytes
    • Usually round off as 1 million bytes

GigaByte

  • (1024)^3 Bytes
    • Usually round off as 1 billion bytes

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