What is a Computer?
A computer is a programmable machine. The two principal characteristics of a computer are: it responds to a specific set of
instructions in a well-defined manner and it can
execute a prerecorded list of instructions (a
program).
Modern Computers Defined
Modern computers are electronic and
digital. The actual machinery -- wires,
transistors, and circuits -- is called
hardware; the instructions and
data are called
software.
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