this is intended only for fundamentals of computer

1. 1© 2004, Cisco Systems, Inc. All rights reserved.
PRESENTATION
FOR PC I
YOUR NAME

2. COMPUTER HARDWARE COMPONENTS

3. WHAT IS COMPUTER
Computer is an electronic
device that is
programmable, accept,
store, and retrieve data or
information.
A device that can perform
arithmetic calculation and
logical operation.

4. The Computer Continuum 3-4
CPU
(Central Processing Unit)
Input
Units
Output
Units
Primary Memory

5. INPUT DEVICES
 Those parts of the computer receiving information to
programs.
 Those parts of a computer that allow the user to
communicate with the computer

6. • The Mouse – An input device that
allow user to command computer
through dragging and clicking.
• The Keyboard - The keyboard is still
the most common way of entering
information into a computer

7. Scanners - allows you to scan printed
material and convert it into a file format that
may be used within the PC.
Touch Pads - A device that lays on the
desktop and responds to pressure
Light Pens - Used to allow users to point to
areas on a screen
Joysticks - Many games require a joystick
for the proper playing of the game

8. A DEVICE WHERE SAVING OUR DATA TAKES PLACE,
HOLDS DATA, INFORMATION.

9. TWO TYPES OF STORAGE DEVICES
PRIMARY STORAGE DEVICE –
STORE DATA TEMPORARILY
(RAM)
SECONDARY STORAGE DEVICE–
STORE DATA PERMANENTLY
UNLESS INTENTIONALLY
DELETED.

10. READ ONLY MEMORY
 RAM - Random Access Memory
 The main 'working' memory
used by the computer.
It holds temporary instructions
and data needed to complete
tasks. This enables the CPU – to
access instructions and data
stored in the memory very
quickly.

11. ROM(READ ONLY MEMORY)
The data or program in rom can
only be read but cannot be at all.
All the contents in rom can be
accessed and read but cannot be
changed.
ROM is non – volatile. It holds the
programs and data when the
computer is powered off.

12.  Hard Disks
 Speed:
 Very fast!
 The speed of a hard disk is often quoted as
"average
 access time" speed, measured in
milliseconds. The
 smaller this number the faster the disk.

13. A floppy disk - is a portable,
inexpensive storage medium
that consists of a thin, circular,
flexible plastic disk with a
magnetic coating enclosed in a
square-shaped plastic shell.

14. OUTPUT DEVICES
 ALLOW THE COMPUTER TO
COMMUNICATE WITH THE USER
 GIVE/SHOWS/PRINT THE RESULTS OF
OUR INPUT

15.  Printer - The printer produces a hard copy of
your output, and the computer screen
produces a soft copy of your output.
 Monitor – The computer screen is used for
outputting information in an understandable
format.
 Speakers - Enhances the value of
educational and presentation products.
 Plotters - A plotter is an output device
similar to a printer, but normally allows you to
print larger images.

16. A Liquid Crystal Display (LCD)
projector uses its own light
source to project what is
displayed on the computer on a
wall or projection screen. A
digital light processing (DLP)
projector uses tiny mirrors to
reflect light which can be seen
clearly in a well-lit room.