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MB definition - telecom
Million bytes. In computing and storage systems, a MB (MegaByte) is actually 1,048,576 (2 20 ) bytes, since the measurement is based on a base 2, or binary, number system.The term MB comes from the fact that 1,048,576 is nominally, or approximately, 1,000,000. See also byte and M.

Webster's New World Telecom Dictionary Copyright © 2008 by Wiley Publishing, Inc., Indianapolis, Indiana.
Used by arrangement with John Wiley & Sons, Inc.

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