Computers are electronic machines that perform tasks according to a set of instructions or programs. The first fully electronic computer was introduced in 1840s. The early computer were huge machines that required a team of people to operate. As compared to those early computers, today's computers are thousands of times faster and smaller .
The word "Computer" is derived from the Latin word " COMPUTARE" which means to calculate. In the past, the computer was normally considered to be a calculating device used to perform different calculations. But today, computer is used in every field of daily life to perform several tasks.
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