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Written by specialist teachers and tutors, they're updated regularly to reflect the latest curriculum changes. Definition of a Computer: A Computer is an electronic device that operates (works) under the control of programs stored in its own memory unit. It covers topics such as binary digits, the conversion between digital and analog signals, various number systems (decimal, binary, octal, hexadecimal), and methods for representing negative numbers in computer memory. This document provides an introduction to computers, including definitions and the historical development of computers from the abacus to modern systems. Sep 13, 2025 · Simple and clear explanations – Making Computer Studies easier to understand and revise. 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