unit, unit of measurement - any division of quantity accepted as a standard of measurement or exchange; "the dollar is the United States unit of currency"; "a unit of wheat is a bushel"; "change per unit volume"

nibble, nybble - a small byte

byte - a sequence of 8 bits (enough to represent one character of alphanumeric data) processed as a single unit of information

sector - the minimum track length that can be assigned to store information; unless otherwise specified a sector of data consists of 512 bytes

block - (computer science) a sector or group of sectors that function as the smallest data unit permitted; "since blocks are often defined as a single sector, the terms `block' and `sector' are sometimes used interchangeably"

allocation unit - a group of sectors on a magnetic disk that can be reserved for the use of a particular file

partition - (computer science) the part of a hard disk that is dedicated to a particular operating system or application and accessed as a single unit

word - a word is a string of bits stored in computer memory; "large computers use words up to 64 bits long"

KB, kilobyte, K - a unit of information equal to one thousand (1024) bytes

MB, megabyte - a unit of information equal to one million (1,048,576) bytes

gigabyte, GB, G - a unit of information equal to one billion (1,073,741,824) bytes or 1024 megabytes

terabyte, TB, T - a unit of information equal to a trillion (1,099,511,627,776) bytes or 1024 gigabytes

petabyte - a unit of information equal to 1,024 terabytes