In
decimal systems,
kilo stands for 1,000, but in
binary systems, a
kilo is 1,024 (2 to the 10th power). Technically, therefore, a kilobyte is 1,024
bytes, but it is often used loosely as a synonym for 1,000 bytes. For example, a
computer that has 256K
main memory can
store approximately 256,000 bytes (or
characters) in
memory at one time.
A megabyte is 2 to the 20th power (approximately 1 million) and a gigabyte is 2 to the 30th power (approximately 1 billion).
In computer literature, kilobyte is usually abbreviated as K or KB. To distinguish between a decimal K (1,000) and a binary K (1,024), the IEEE has suggested following the convention of using a small k for a decimal kilo and a capital K for a binary kilo, but this convention is by no means strictly followed.
