hi friends welcome to my slide share. An easy way to learn computer . In this video I am going to tell you about basic of the computer system part -1 . for more information please watch our SlideShare till end.....

2. Defining computers
A computer is an electronic device that:
•Accepts information and instructions from a user
•Processes data
•Stores data for later retrieval
•Produces out put

3. TYPES OF COMPUTER
1. PERSONAL COMPUTER
2. MAINFRAME COMPUTER
3. MINICOMPUTER
4.SUPER COMPUTER

4. PERSONAL COMPUTER:
It can be defined as a small, relatively inexpensive
computer designed for an individual user. In price,
personal computers range anywhere from a few
hundred pounds to over five thousand pounds. All are
based on the microprocessor technology that enables
manufacturers to put an entire CPU on one chip.
Businesses use personal computers for word processing,
accounting, desktop publishing, and for running
spreadsheet and database management applications. At
home, the most popular use for personal computers is
for playing games and recently for surfing the Internet.

5. MAINFRAME
Mainframe was a term originally referring to the cabinet containing
the central processor unit or "main frame" of a room-filling Stone
Age batch machine. After the emergence of smaller
"minicomputer" designs in the early 1970s, the traditional big iron
machines were described as "mainframe computers" and
eventually just as mainframes. Nowadays a Mainframe is a very
large and expensive computer capable of supporting hundreds, or
even thousands, of users simultaneously. The chief difference
between a supercomputer and a mainframe is that a
supercomputer channels all its power into executing a few
programs as fast as possible, whereas a mainframe uses its power
to execute many programs concurrently. In some ways, mainframes
are more powerful than supercomputers because they support
more simultaneous programs. But supercomputers can execute a
single program faster than a mainframe. The distinction between
small mainframes and minicomputers is vague, depending really on
how the manufacturer wants to market its machines.

6. MINICOMPUTER
It is a midsize computer. In the past decade, the
distinction between large minicomputers and
small mainframes has blurred, however, as has the
distinction between small minicomputers and
workstations. But in general, a minicomputer is a
multiprocessing system capable of supporting
from up to 200 users simultaneously.

7. SUPERCOMPUTER
Supercomputer is a broad term for one of the fastest
computers currently available. Supercomputers are very
expensive and are employed for specialized applications
that require immense amounts of mathematical
calculations (number crunching). For example, weather
forecasting requires a supercomputer. Other uses of
supercomputers scientific simulations, (animated)
graphics, fluid dynamic calculations, nuclear energy
research, electronic design, and analysis of geological
data (e.g. in petrochemical prospecting). Perhaps the
best known supercomputer manufacturer is Cray
Research.

8. PARTS OF THE COMPUTER SYSTEM
A complete computer system consists
of mainly four parts.
1.hardware( the computer)
2.Software(programs)
3.Data( information)
4.User (people)

9. HARDWARE
Hardware is a comprehensive term for all of the physical
parts of a computer, as distinguished from the data it
contains or operates on, and the software that provides
instructions for the hardware to acoomplish tasks.
The boundary between hardware and software is
slightly blurry - firmware is software that is "built-in" to
the hardware, but such firmware is usually the province
of computer programmers and computer engineers in
any case and not an issue that computer users need to
concern themselves with.

10. SOFTWARE
Software is a generic term for organized
collections of computer data and instructions,
often broken into two major categories:
system software that provides the basic non-
task-specific functions of the computer, and
application software which is used by users to
accomplish specific tasks.

11. INPUT DEVICE
An input device is any
hardware device that sends data to a
computer, allowing you to interact
with and control it. The picture shows
a Logitech trackball mouse, which is
an example of an input device.

12. OUT PUT DEVICES EXAMPLES
SPEAKER,HEADPHONES,LCD
PRINTER, LCD, MONITOR

13. 1.JOYSTICK
2.MOUSE
3.CAMERA
4.TOUCH TABLET
5.KEYBOARD

14. output device
An output device is any device used to
send data from a computer to
another device or user. Most computer
data output that is meant for humans is
in the form of audio or video. Thus,
most output devices used by humans
are in these categories. Examples
include monitors, projectors, speakers,
headphones and printers.

15. Parts of a mouse

16. Parts of keyboard