A computer system is an electronic device derived from the word 'compute,' designed to perform various tasks by executing instructions. Key components include the central processing unit (CPU), monitor, mouse, keyboard, printer, modem, and speakers, each serving essential functions in operation and interaction. Computers are characterized by speed, accuracy, reliability, and versatility, and their storage memory is categorized into internal (cache and main memory) and external types.

4. WHAT IS COMPUTER
SYSTEM
1.The word is derived from ‘compute’, which means to
calculate.
2. A Computer is an electronic device that can
perform a variety of tasks by executing a given set of
instructions.
3.It is a versatile and can handle multiple tasks like
documentation, accounting, designing, airlines,
railways and many more.
4. The acronym for COMPUTER is Common
Oriented Machine Particularly Used for Trade and
Education Research.

5. ORGANIZATION OF COMPUTER
SYSTEM

6. CENTRAL PROCESSING
UNIT
A central processing unit (CPU) is the
electronic circuitry within a computer
that carries out the instructions of a
computer program by performing the
basic arithmetic , logical , control and
input/output (I/O) operations
specified by the instructions.

7. MONITOR
1. A monitor or a display is an
electronic visual display for
computers.
2. The display device in modern
monitors is typically a thin film
transistor liquid crystals (TFT-
LCD) thin panel, while older
monitors used a cathode ray
tube (CRT) about as deep as the
screen size.

8. MOUSE
In computing, a mouse is a
pointing device that detects two-
Dimensional motion relative to a
surface. This motion is typically
translated into the motion of a
pointer on a display, which
allows for fine control of a
graphical user interface.

9. KEYBOARD
1. A keyboard typically has
characters engraved or printed
on the keys and each press of a
key typically corresponds to a
signal written symbol.
2. However, to produces some
symbols requires pressing and
holding several keys
simultaneously or in sequence.

10. PRINTER
In computing, a printer
is a peripheral which
makes a persistent
human readable
representation of
graphics or text on
paper or similar
physical media.

11. MODEM
A modem (modulator-
demodulator) is a device
that modulates signals to
encode digital information
and demodulates signals to
decode the transmitted
information.

12. SPEAKER
Computer speakers, or multimedia
speakers, are speakers external to a
computer, that disable the lower fidelity
built-in speaker.

13. CHARACTERISTICS OF A COMPUTER
1.Speed
2.Accuracy
3.Reliability
4.Storage Capacity
5.Versatility
6.Reduction in Manpower
7.Reduction in Paper Work

14. MEMORY TYPES
1. Computer memory is the storage space in computer
where data is to be processed
And instructions required for processing are stored.
2. Memory is primarily of two types-
* Internal Memory- cache memory and
primary/main memory.
* External Memory- magnetic disk/ optical disk etc.