A related unit, the tebibyte (TiB), using a binary prefix, is equal to 10244 bytes. One terabyte is about 0.9095 TiB. Despite the longstanding use of TB by hard drive and tape drive manufacturers to mean 1000 billion bytes, following international standards, the terabyte is used in some computer operating systems, primarily Microsoft Windows, to denote 1099511627776 (10244 or 240) bytes for disk drive capacity.
The prefix tera was defined for the International System of Units in 1960. It is derived from the Greek word teras, meaning "monster"., but it has also connotation to the Greek word tetra, meaning "four", in analogy to the subsequent prefix names being correlated to magnitude of the decimal exponent.
Usage of terabyte in information technology products includes:
Database: 1984, Teradata's DBC/1012 is designed to manage a massively parallel processing database up to one terabyte in size.
Examples of the use of terabyte to describe data sizes in different fields are:
Library data: The U.S. Library of Congress Web Capture team claims that as of March 2014[update] the library had "collected about 525 terabytes of web archive data" and that it was adding about 5 terabytes per month ("one terabyte = 1,024 [sic] gigabytes").
Computer hardware: Hitachi introduced the world's first one terabyte hard disk drive in 2007 (1 terabyte = 1,000 gigabytes).
SD card: Micron and SanDisk unveiled their microSDXC cards of 1 TB capacity, in February 2019. September 2016 Western Digital (SanDisk) announced that a prototype of the first 1 TB SDXC card will be demonstrated at Photokina.
^Vetter, R. J., Du, D. H., & Klietz, A. E. (1992, March). Network Supercomputing: Experiments with a Cray-2 to CM-2 HiPPI Connection. In Heterogeneous Processing, 1992. Proceedings. Workshop on (pp. 87-92). IEEE.