Definition:
1.
Computer is an electronic machine that can
perform mathematical calculation within a time.
2.
A computer is an electronic machine that takes
data and instructions as an input, processes the data according to the given
set of instructions and gives the meaningful information as result.
3.
A computer is a machine that
performs processes, calculations and operations based on instructions provided
by a software or hardware program.
Four Basic
part of Computer:
1.
Keyboard
2. Mouse
3. Monitor
4. CPU
Keyboard
Keyboard is primarily used an input device,
it's like a typewriter. Keyboard is mostly used for entering the data and instructions
for computer. It has contents of different types of keys as: Alphabet keys,
Numeric keys, Function keys, Symbols keys, Special keys, Punctuation keys etc.
Mouse
Mouse is a small handheld input device and it's also called pointing device.
It can do controlling the cursor of screen.
Monitor
Monitor is a softcopy output device. Its looks
like a TV set. Monitor is must be used for display the result. Users used for
different types of monitor like: CRT, LCD and LED.
CPU
CPU is a device that can perform controlling
overall the system. It's like a human brain. So, CPU of computer is called brain
of computer. Whereas all of the devices are connected to the CPU.