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classification of digital computer
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- 3. Micro Computers Microcomputeris also called Personal Computer. Introduced by IBM commercially called IBM PC. CPU created on a single chip. Effective for individual work.
- 4. Types of MicroComputers Workstations Desktops Servers Laptops Notebooks
- 5. Personal Computers • PCsare 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 • Smallerand more powerful • Easy to carry all around. • Types: –Laptops/Notebooks –Subnotebooks –PDAs (Personal Digital Assistants)
- 7. Laptops • Same asPCs in functionality • More Compact, Portable • Operated on both battery and power. • Less capacity compared to PCs
- 8. PDA – PersonalDigital 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
- 10. Mini Computers • Minicomputersare 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.
- 11. Mainframes • Large computersboth 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.
- 13. Network Computers • Collectionof 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
- 15. Workstations • They aresimilar 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.
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- 17. Servers • A serveris 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
- 18. Supercomputers • Extremely fastin 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.