Types of computers

types of computer on the basis of data handled and size

1. Types of Computers/ Classification of Computers/ Categories of Computers By : Prabesh Shrestha

2. Types of computer on the basis of data handled

3. Analog Computers The computers that measure continuous data like physical quantities such as pressure, speed, time or temperature and convert them to numeric values also called analogue computer Designed to perform a particular or a single task Low accuracy and limited storage capacity but very high speed widely used in industrial, medical and scientific purposes Some examples of analog or analogue computers are:

4. Speedometer Thermometer

5. Heathkit EC-1 Slide Rule : First analog computer invented by William Oughtred in 1620 AKAT-1

6. Deltar Kerrison Predictor

7. Torquetum Water Integrator

8. Digital Computers The computers which is both electronic and digital computer Measures discrete or discontinuous data and uses binary digits 0 and 1. Most popular computer. Highly accurate, fast and reliable Use processor as a memory chip Information is given to the computer in the form of electric signals Used to perform arithmetic and logical calculations Some examples of digital electronic computers are:

9. Desktop Computers Laptop Computers

10. Apple/ Macintosh Tianhe 2 IBM PC IMSAI 8080 PDP 8

11. T here are generally two types of digital computer , they are: General purpose digital computer Designed to perform many tasks. Complex and expensive. Used in engineering, science, commerce and industry. Special purpose digital computer Designed to perform specific task. Simpler and cheaper. Used in automobiles to control fuel and breaking system accounting software used, accounting software used by business firms, banks, etc.

12. Hybrid Computers The computer which is the combination of both digital and analog computer Mostly used for scientific research and engineering purposes Has the speed of analog computers and the accuracy of digital computers Special purpose machines. Have convertors which can covert analog signal into digital signal and vice versa. Some examples of hybrid computers are:

13. E c g monitor Hrs- 100 Sonogram machine

14. Polish hybrid computer WAT 1001

15. Types of computer on the basis of size

16. Super Computers Largest and powerful computer Capable of processing large amount of data at a tremendous speed. Expensive and used only for specialized purpose. Kept in protective room with special cooling systems, power protection and other security features. Speed of super computer is measured in FLOPS (Floating point Operations Per Second) Used for weather forecasting, weapon research, designing vehicles, aircrafts, oil exploration, nuclear research etc. For Example:: CRAY, PLEIADES, PARAM PADMA, IBM ROAD RUNNER, TIANHE-IA, NEC EARTH SIMULATOR, CRAY JAGUAR, IBM BLUE GENE, STRATUS etc…..

17. Super Computers CRAY I CRAY I

18. Contd…Super Computers PLEIADES PARAM PADMA

19. Contd…Super Computers IBM ROAD RUNNER TIANHE-IA

20. Contd…Super Computers NEC EARTH SIMULATOR (measures effects of global warming) CRAY JAGUAR

21. Contd…Super Computers STRATUS (weather forecasting) IBM BLUE GENE

22. Contd…..Super Computer Deep Blue was a chess-playing computer developed by IBM. On May 11, 1997, this machine won the six-game match against world champion Garry Kasparov by two wins to one with three draws. Kasparov accused IBM of cheating and demanded a rematch. IBM refused and retired Deep Blue. Kasparov had beaten a previous version of Deep Blue in 1996.

23. Mainframe Computer Also known as BIG IRON Second largest, powerful, expensive and ultra fast computers High speed data processing with massive storage capacity Supports upto 100 or 1000 users at a time Kept inside glass offices with special air conditioning , full power backup and other security features. Used in large organization, financial data processing, universities, military purpose etc For EXAMPLES::

24. Contd…Mainframe Computers IBM SYSTEM/360 UNIVAC I

25. Contd…Mainframe Computers IBM SYSTEM /370 IBM 704

26. Contd…Mainframe Computers HONEYWELL 1800 IBM 7094

27. Mini Computer Mid range computer with slower speed, less memory capacity, limited hardware compared to mainframe computers Supports up to 50 users at a time Used in large organization, universities, research institute etc Used to look out production process and stocks in industries, payroll preparation, accounting and scientific computation For EXAMPLES::

28. Contd…Mini Computers HP 3000 SERIES PDP 8

29. Contd…Mini Computers GENERAL AUTOMATION INTERDATA 8/32

30. Contd…Mini Computers DEC- PDP 11 CAI 216

31. Micro Computer Small digital computer with MICROPROCESSOR in CPU Cheap, compact, portable with excellent graphic capabilities Consist of RAM, suitable storage device and various input/output devices Designed to be used by a single person only Used in schools, home, offices, banks, hospitals etc… Also known as “PERSONAL COMPUTER” For EXAMPLES::

32. Contd…Micro Computers IMSAI 8080 MITS ALTAIR 8800

33. Contd…Micro Computers MOTOROLA MEK6800D2 AIM 65

34. Types of Micro Computers Desktop Computers Designed to be used on the desk or table Separate system unit (CPU), screen, keyboard, mouse, speakers etc Not so portable Consists of 2 types of models DESKTOP model is broad and low TOWER model is narrow and tall

35. Contd…Desktop Computers DESKTOP model TOWER model

36. Contd…Examples of Desktop Computers

37. Types of Micro Computers Laptop Computer Designed to be used on the lap System unit (CPU), screen, keyboard, touchpad, speakers etc are integrated (combined) Small, portable designed for mobile use Comes with a rechargeable battery Can be used at the time of no electricity for few hours if charged sufficiently

38. Contd…Examples of Laptop Computers

39. Types of Micro Computers Palmtop Computer Small, light weight, programmable computer designed to be used on the palm of hand Use stylus or Metal pen and touch sensitive screen Also known as Handheld PC EXAMPLES::NEC MOBILE PRO 900C, HP 320LX, HP JORNADA 720, VADEM CLIO

40. Contd…Examples of Palmtop Computers NEC MOBILE PRO 900c HP 320LX

41. Contd…Examples of Palmtop Computers HP JORNADA 720 VADEM CLIO

42. Types of Micro Computers Wearable Computer Computer that can be worn on the body Consist of voice recognition, head mounted display, wireless communication, touchpad etc Used in health monitoring system, information technology, military trainings etc. EXAMPLES::POMA, TIMEX DATALINK etc…

43. Contd…Examples of Wearable Computers POMA TIMEX DATALINK

44. Contd…Examples of Wearable Computers KOPIN GOLDEN I GEN 2 VIVOMETRICS

45. Contd…Examples of Wearable Computers GOOGLE GLASS SYMBOL WT-4000 SERIES

46. Types of Micro Computers Pocket Computer Small, portable handheld, calculator sized computer running on batteries Data transfer can be done by connecting it to desktop or laptop or through Bluetooth as well EXAMPLES::PB-2000, PB-80, PB-100, PB-500F etc…

47. PB-2000C Contd…Examples of Pocket Computers PB-80

48. PB-100 Contd…Examples of Pocket Computers PB-500F

49. OQO MODEL 2 Contd…Examples of Pocket Computers SONY VAIO ZX-8

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