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Petabyte (PB), data storage

A petabit (P or Pbit) is a unit of information as well as a multipel of a bit (which in turn is derived from "binary digit"). The name comes from the SI prefix peta (P) for a quadrillion and bit (b). A petabit is related to the unit pebibit (Pib) which is the equivalent of 250 bits, and are sometimes used as synonyms even though this is discouraged by SI and IEC. Petabit is used to measure the device bit rate of computer networks, in the shape of petabit per second (Pbps).

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