Defination and types of computer

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“Computer” is a word derived from “compute” which means to calculate
 A computer is a programmable electronic machine that processes information
 A computer is an electronic device which has ability to receive information in a
particular format and perform a series of operations in predetermined but
varied set of procedural instructions to produce a result in the form of
 Computer is a fast, electronic data processing machine/device for receiving,
storing, processing, analyzing and retrieving any amount of data or information
with 100% of accuracy following a set of instructions given to it by human
 It does all work assigned to it perfectly without committing any mistakes.