classification of digital computer

classification of digital computer

1. Classification of Digital Computers

2. Network Computers Portable Computers Super computers Digital computers Micro Computers Mini Computers Mainframes computers Personal Computers

3. Micro Computers Microcomputer is also called Personal Computer. Introduced by IBM commercially called IBM PC . CPU created on a single chip. Effective for individual work.

4. Types of Micro Computers Workstations Desktops Servers Laptops Notebooks

5. Personal Computers PCs are desktop or portable machines. Easy to use Used in homes, Educations Institutions and Organizations as nodes Can perform typical activities like documentation, playing games, surfing web to more complex activities as programming, design, DTP etc.

6. Portable Computers Smaller and more powerful Easy to carry all around. Types: Laptops/Notebooks Subnotebooks PDAs (Personal Digital Assistants)

7. Laptops Same as PCs in functionality More Compact, Portable Operated on both battery and power. Less capacity compared to PCs

8. PDA – Personal Digital Assistant Like Mini computer in a general sense Smaller than laptops (can be called Palmtops) Used to store information used frequently wherever you go ie day to day activities. Nowadays work with smart cards which has all the information of a user and his/her transactions

9. Mini Computers Minicomputers are in between mainframes and Microcomputers. They are also called midrange computers. Client - Server Architecture is used. Used in many organizations, companies, factories etc as it have to work 24 hours.

10. Mainframes Large computers both in terms of physical size as well as computations Process several million instructions per second. They support huge numbers of users Basically used to store and process huge amount of data Used in banks, insurance companies, airlines, railway stations ect .

11. Network Computers Collection of PCs Designed to connect internet called Internet boxes, Net PCs and Internet appliances. Can share the information, work from anywhere to anywhere. LAN – WAN – MAN – Internet

12. Workstations They are similar to PCs but with more memory and a high speed processor They are intended to support network operating systems and network applications. They are used in architectural design, video editing, scientists, animations etc. The more powerful workstations are called super-micros.

13. Work station Computers

14. Servers A server is one for which many PCs are connected. It has large capacity secondary storage and more memory They host, like workstations, network servers and operating systems They avoid duplicate installation of applications and all users will access to a common copy of the program

15. Supercomputers Extremely fast in operation 1 trillion operations in nanosecond or even in picoseconds. Massive parallel processing technology used ie 8.6 billion calculations per sec. Fastest, costliest and powerful computer available today. Application involves weather forecasting, military applications, electronic design etc.