A computer is a general purpose device that can be programmed to carry out a set of
arithmetic or logical operations. Since a sequence of operations can be readily
changed, the computer can solve more than one kind of problem.
Conventionally, a computer...
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A computer is a general purpose device that can be programmed to carry out a set of
arithmetic or logical operations. Since a sequence of operations can be readily
changed, the computer can solve more than one kind of problem.
Conventionally, a computer consists of at least one processing element, typically a
central processing unit (CPU) and some form of memory. The processing element
carries out arithmetic and logic operations, and a sequencing and control unit that
can change the order of operations based on stored information. Peripheral devices
allow information to be retrieved from an external source, and the result of
operations saved and retrieved.
The first electronic digital computers were developed between 1940 and 1945.
Originally they were the size of a large room, consuming as much power as several
hundred modern personal computers (PCs).[1] In this era mechanical analog computers
were used for military applications.
Modern computers based on integrated circuits are milli
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