basics of computers

1. Day1Day1
Introduction toIntroduction to
ComputersComputers

2. conceptsconcepts
 Definition of computerDefinition of computer
 Terminology related to computers hardware,Terminology related to computers hardware,
software, mouse, keyboard, CPU, UPS , RAM,software, mouse, keyboard, CPU, UPS , RAM,
Hard disk, SMPS, etcHard disk, SMPS, etc
 Connecting peripheralsConnecting peripherals
 Knowing configuration of computersKnowing configuration of computers
 Briefing functions of CPUBriefing functions of CPU
 What is virusWhat is virus

3. Computers areComputers are electronic deviceselectronic devices that canthat can
follow instructionsfollow instructions toto accept inputaccept input,, processprocess thethe
inputinput andand then producethen produce informationinformation.. It is aIt is a
machine that manipulates data according to a set ofmachine that manipulates data according to a set of
instructions.instructions.
What are computers?What are computers?

4. HARDWARE
SOFTWARELook inside the computer

5. HardwareHardware

6. The Case (System Unit or System Cabinet)The Case (System Unit or System Cabinet)

7. PORTS ARE USED CONNECT PERIPHERALS

12. Hardware OrganizationHardware Organization
motherboard
CPU
memory
hard drive
Input Devices ...

13. Examples of Input DevicesExamples of Input Devices
1.1. KeyboardKeyboard ((QWERTY keyboard, ATMs keyboardQWERTY keyboard, ATMs keyboard))
ATM: automatic teller machineATM: automatic teller machine
2. Mouse2. Mouse
3. Scanner3. Scanner
4. Pre-storage Devise4. Pre-storage Devise
5. Optical mark recognition (Light Pin , Bar5. Optical mark recognition (Light Pin , Bar
code scanners)code scanners)
6. Microphone6. Microphone
7. Joystick .7. Joystick .

15. Central Processing Unit (CPU)
• A specific chip or the processor
a CPU's performance is
determined by the rest of the
computers circuitry and chips.
• The Central Processing Unit
(CPU) performs the actual
processing of data
• The speed (clock speed) of CPU
measured by Hertz (MHz)

16. Main MemoryMain Memory

17. Secondary StorageSecondary Storage
 Stores data and programs
permanently: its retained after the
power is turned off
 Examples
• Hard Drive (Hard Disk)
Located outside the CPU, but most often
contained in the system cabinet
• Floppy Disk
• Optical Laser Discs
CD-ROM, CD-RW, and DVD

18.  tapestapes
 Panasonic's LS120 3.5 inch diskettesPanasonic's LS120 3.5 inch diskettes
 Iomega's Zip & Jazz disksIomega's Zip & Jazz disks
 VCR tape (Video Cassette Recorder )VCR tape (Video Cassette Recorder )
 Flash USB disksFlash USB disks
 MMC (Multi Media Card )MMC (Multi Media Card )
 SDSD
Common Secondary Media

19. Output Devices
Pieces of equipment that translate the
processed information fromfrom the CPU intointo a
form that humans can understand.
CPU
Processed
inform
ation

20. Computer VirusesComputer Viruses

21. Computer VirusesComputer Viruses
 A computer virusA computer virus are small software programsare small software programs
that are designed to spread from one computer tothat are designed to spread from one computer to
another and to interfere with computer operation.another and to interfere with computer operation.
A virus might corrupt or delete data on your computer,A virus might corrupt or delete data on your computer,
use your e-mail program to spread itself to otheruse your e-mail program to spread itself to other
computers, or even erase everything on your hardcomputers, or even erase everything on your hard
disk.disk.

22. Viruses and VirusViruses and Virus
ProtectionProtection
 A virus programA virus program
 Infects programs, documents,Infects programs, documents,
databases and more …databases and more …
 It is man-madeIt is man-made
 It can hide and reproduceIt can hide and reproduce
 It can lay dormant (inactive)It can lay dormant (inactive)
and then activateand then activate
Anti-virus programs can helphelp

23. THANK YOU