the mathematical theory concerned with the content, transmission, storage, and retrieval of information, usually in the form of messages or data, and especially by means of computers.
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Origin of information theory
First recorded in 1945–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for information theory
a collection of mathematical theories, based on statistics, concerned with methods of coding, transmitting, storing, retrieving, and decoding information
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Science definitions for information theory
A branch of mathematics that mathematically defines and analyzes the concept of information. Information theory involves statistics and probability theory, and applications include the design of systems that have to do with data transmission, encryption, compression, and other information processing.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.