The 'Computer' is an automatic device that performs mathematical calculations that logical operations. Computers are being put to use in widely divergent fields such as book-keeping, spaceflight controls, passanger reservation service, language translation, etc. There are two broad categories: analong and digital. The former represents numbers by some physical quantity such as length, angular relation or electric current whereas the latter represent numbers by seperate devices for each digit.
The 'Computer' is an automatic device that performs mathematical calculations that logical operations. Computers are being put to use in widely divergent fields such as book-keeping, spaceflight controls, passanger reservation service, language translation, etc. There are two broad categories: analong and digital. The former represents numbers by some physical quantity such as length, angular relation or electric current whereas the latter represent numbers by seperate devices for each digit. 
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