1. Computer Science Introduction
What is a Computer
Computer Science Introduction

2. Computer???

3. Defenition
A Computer is an electronic devices operating under the control of instructions (software) stored in its own memory unit, that can accept data (input), manipulate data (process), and produce information (output) from the processing. Generally, the term is used to describe a collection of devices that function together as a system.

4. Computer Systems Speaker (Output Device) Monitor (output Device)
Processing Unit
Printer
(Output Device)
CD RW, Floopy (Storage Device)
Scanner
(input Device)
Mouse
( Input Device)

5. Computer Systems
Hardware
Software
Brainware

6. PC
“The Box”
CD-ROM Drive
CRT Display
Floppy
Disk
Drive
Keyboard
Mouse

7. What does a computer do?
Computers can perform four general operations :
Input
Process
Output
Storage

8. Computer Generations First Generation (1940 – 1956)
Used Vacuum Tubes for Circuitry
Magnetic drums for memory
Need a great deal of electricity
Used punch card and paper tape as input device
Print out as output
Machine Languange

9. ENIAC I
Vacuum Tube

10. ENIAC 2

11. Computer Generations Second Generation (1956 -1963) Used Transistors
Punch card as input
Magnetic core technology for memory
Print Out as output
High level programming language

12. ILLIAC II

13. Computer Generations Third Generation (1964 -1971) Used IC & MSI
Used keyboard and monitor for users interacted with the computer
Used Operating system as interface

14. IBM 7090

15. 3 computer’s component generations: VACUUM TUBE, TRANSISTOR and IC

16. Computer Generations Fourth Generation (1971 – Presents)
Microprocessor
CPU and Memory to input output on a single chip

17. 1st PC: ALTAIR 8800

18. APPLE COMPUTER

19. IBM PC

20. Computer Generations Fifth Generation ( Present and Beyond)
Artificial Intelligent
Voice recognition
Quantum computation and nano technology
Natural language

21. Classification of Computer Systems
According to Data Processing
Analog Computer
Digital Computer
Hybrid Computer

22. Classification of Computer Systems
According to size
Micro Computer (PC)
Mini Computer
Mainframe
Super Computer
Laptop
Palmtop

23. Software Classification

24. Exercises Distinguish between hardware, software and brainware
Distinguish between application software and system/utility software
Define high level languange and low level languange
Explain about classification of computers according to size and data processing
Write about profession in IT

25. Thank You