1. Page 1

2. Page 2  Mehran University College Of Engineeirng And Technology Kkaripur Mir’s  Name:- Gul Nawaz Khan Mahar  Roll No:- 12K-EL 17, 12K-EL 01, 12K-EL 03,52  Assignment:- Computer & E-Learning  Lecturer:- Engineer Ehsanullah Memon  Last date of submission:- 03-3-2012

3. Page 3  Overview  Types of computer:- 1.Analogue computer 2.Digital computer 3.Hybrid computer  Classes of computer:- 1.Desktop pc 2.Workstation pc 3.Notebook pc 4.Tablet pc 5.Handheld pc 6.Smart phones

4. Page 4  INTRODUCTION TO TYPES OF COMPUTER:-  Computer are available in different shapes, size and weights,  They perform different sort of jobs  All the computers are designed by the qualified architectures as per requirement of users  Computers have many types  But Basic three types are as under:- 1.Analogue computer 2.Digital computer 3.Hybrid computer

5. Page 5 Analog Computer Hybrid Computer Digital Computer

6. Page 6  Analogue computer:-  It uses the analogue signals  Contineous varing voltage  In contrast, digital computers work on numerical values called digits  Analog computers have been built using mechanical, hydraulic, optical and electric principles  Used to measure values and other required operations like temperature & volume  Had elecrtical provlems and limitaions  Use of Analog computers is almost obsolete now

7. Page 7 Analogue computers Contineously varing voltage

8. Page 8  Digital Computer:-  Stores data in terms of digits (numbers)  Data is represented by 1 and 0 (0=OFF, 1=ON)  High speed and aren’t affected by atmosphere  In digital computers, even letters, words and whole texts are represented digitally  Usually in the binary number system  circuits perform directly methamatical operations addition, substraction, division, and multiplication  A digital computer can store the results of its calculations for later use

9. Page 9 Digital computers Digital signals showing ON and OFF position

10. Page 10  Hybrid computer:-  Has both qualities i.e analogue and digital  contains convertes which converts analogue signals to digital and vise versa  Digital component normally serves as the controller  Analogue component normally serves as a solver  Accepts analog signals, converts them to digital  So also known as analog-digital computer  Hybrid computers measures discrete values (digital)  Changes continuously in magnitude (analog)

11. Page 11 Hybrid computers

12. Page 12 Classes Of Computer:-  Introduction:-  Classification of computers can be determined only by computer’s Size & Power  Computers are classified in six models given below 1.Desktop pc 2. Workstation pc 3. Notebook pc 4. Tablet pc 5. Hand Held pc 6. Smart Phones

13. Page 13  Desktop pc:-  Two designs Horizontal (desktop) and Vertical (tower)  Used for communication, produce music, graphics, video etc  Desktop computers are usually less expensive than laptops  Most desktops offer more power, storage and versatility  Mostlay suitable for office and home usage  Desktop computers have generally limited editions comparing to Tower  Can be connected to local and wide area network for internet access  wide range of high performance desktop pcs’ are now available

14. Page 14 Tower Model Desktop Model

15. Page 15  Work station pc:-  More powerful than desktop pc  Large high resolution monitors and accelerated graphics  More powerful processor, additional memory  Ehanced capabilities for performing a special group of task  Specially used for 3D Graphics or game development  Most sound editors use workstation computers for sound editing  Like personal computers, most workstations are single-user computers  workstations are typically linked together to form a local area network

16. Page 16 Work station pcs

17. Page 17  Notebook pc:-  Size can be 8.5 to 11 inches are called Laptops  They need batteries for power  Laptops are portable computers that integrate the display, keyboard, a pointing device or trackball  Processor, memory and hard drive all in a battery-operated  Slightly larger than an average hardcover book  It is designed for mobility, miniaturized technology  Made for low power consumption  But significantly more expensive than desktop systems

18. Page 18 Notebook pcs

19. Page 19  Tablet pc:-  Tablet PC or slate-shaped mobile computer  Equipped with a touch screen type of notebook  Same functions as notebook pc but have pen  Special-purpose pen called Stylus  The handwriting is digitized and can be converted to standard text  The tablet PC relies on digital ink (technology that digitally represents handwriting in its natural form)  Create an electromagnetic field below LCD that can capture the movement of the pen  Its effect is like writing on paper with liquid ink

20. Page 20 Tablet pcs

21. Page 21  Hand Held pc:-  Computing devices, small enough to held in hand  Called personal digital assistant(PDA)  Applications are taking notes, displaying telephone numbers  It can be connected to large phones  Most PDA come with touch screen  Access the internet through wireless connection  Offer features like, cameras, music players, global positioning system

22. Page 22 Handheld pcs

23. Page 23  Smart phones pc:-  Simply a phone with advanced features like e-mail, Internet and e-book  Reader capabilities and built-in keyboard  It is a miniature computer that has phone capability  Smart cell phone is a mobile phone  Advanced capabilities, often with PC-like functionality and can work PC- Mobile handset conversion  Have a lot of verity in it  Used frequently all over the globe

24. Page 24 Smart phones