A computer is a device that can perform computations and make
logical decisions billions of times faster than human beings can,
e.g. many personal computers (PCs) can perform several billion
additions per second.
Computers process data under the control of sets of instructions
called computer programs
These programs guide the computer through orderly sets of
action specified by people called computer programmers
A computer consists of various devices (e.g. keyboard, screen,
mouse, hard disk, memory, etc.) referred to as hardware
The programs that run on a computer are referred to as
software, e.g. Microsoft word, anti-virus program, etc.
