Computer
The word computer comes from the word
“compute’’ which means “to calculate’’.
Hence Computer to be a calculating ...
Characterstics of computer
• Automatic machine.
• High speed.
• Accuracy
• Versatile
• Storing
• Deligence
Limitation of computer
• No IQ
• No feelings
• No learning capacity
• Human dependent
• Hardware and software
dependent
Computer generations
• Computer generation is a step in
technology. It provides a framework
for the growth of computer. it...
1st GENRATION
(1942-1945)
• These machine use thousands of vacuum
tubes
• These vacuum tube are made up of fragile
glass d...
2nd GENERATION
(1955-1962)
• In this new electronic devices are invented
that must called transistors.
• These were more p...
3rd generation
(1964-1975)
•
•
•
•
•

In this integrated circuits are used.
The were smaller and less expensive.
Consumed ...
4th generation
(1975-1989)
• In this micro processor were used.
• Faster smaller and less power consuming then
third gener...
5th generation.
(1989-present)
• This generation increase the power of micro
processor chip.
• VLSI technology become ULSI...
Basic function of computer
• Inputting
• Storing
• Processing
• Outputting
• controlling
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WHAT ABOUT COMPUTER

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WHAT ABOUT COMPUTER

  1. 1. Computer The word computer comes from the word “compute’’ which means “to calculate’’. Hence Computer to be a calculating device that can perform arithmetic operations at high speed. A computer is an electronic device which Processes information based upon the instructions provided the deseire output.a computer can store processes and retrieve data as and when desired.
  2. 2. Characterstics of computer • Automatic machine. • High speed. • Accuracy • Versatile • Storing • Deligence
  3. 3. Limitation of computer • No IQ • No feelings • No learning capacity • Human dependent • Hardware and software dependent
  4. 4. Computer generations • Computer generation is a step in technology. It provides a framework for the growth of computer. it has now extend to include both hardware and software to make a computer system
  5. 5. 1st GENRATION (1942-1945) • These machine use thousands of vacuum tubes • These vacuum tube are made up of fragile glass device which used filaments as a source of electronics and could control the electronic signals.
  6. 6. 2nd GENERATION (1955-1962) • In this new electronic devices are invented that must called transistors. • These were more powerful • Less expensive. • They use magnetic disk and tape as a secondary storage medium. • High-level languages were used in second genration
  7. 7. 3rd generation (1964-1975) • • • • • In this integrated circuits are used. The were smaller and less expensive. Consumed less power and produced less heat. Mini computers were used. Time sharing operating system were invented in this generation.
  8. 8. 4th generation (1975-1989) • In this micro processor were used. • Faster smaller and less power consuming then third generation. • They were general purpose machine. • Graphical user interface used. • hey were use in hTomes and as for personal use of an human being.
  9. 9. 5th generation. (1989-present) • This generation increase the power of micro processor chip. • VLSI technology become ULSI. • More user friendly. • Large primary storage capacity. • Provide network facility(lan,man ,wan)
  10. 10. Basic function of computer • Inputting • Storing • Processing • Outputting • controlling

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