Unit of Digital Information Storage
Pebibyte	250 Bytes 1024 Gibibyte
SI	IEC
Decimal	Binary
kilobyte kB 103 megabyte MB 106 gigabyte GB 109 terabyte TB 1012 petabyte PB 1015 exabyte EB 1018 zettabyte ZB 1021 yottabyte YB 1024	kibibyte KiB 210 mebibyte MiB 220 gibibyte GiB 230 tebibyte TiB 240 pebibyte PiB 250 exbibyte EiB 260 zebibyte ZiB 270 yobibyte YiB 280
(larger units were proposed but have not yet formally been adopted by the BIPM)

A Pebibyte (PiB), derived from peta-binary-byte, is a unit of digital information storage equal to 1024 tebibyte. This is in contrast to a petabyte, meaning 1000 terabyte. The unit was established by the International Electrotechnical Commission in 1998 to differentiate units in base 10 from units in base 2. IEC formally added it to IEC 60027-2 which was later superseded by IEC 80000-13.