What is a computer ?
<ul><li>I – General presentation
II – Hardware and  Software Components
III – The memory
IV – The CPU
V – Conclusion </li></ul>
I – General presentation Screen Keyboard Mouse Scanner or hard disk Printer
II – Hardware and Software Components <ul><li>Hardware  :
It's an object or something that you can touch, like screen, printer or mouse. </li></ul><ul><li>Software  :
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What is a computer tifanie, ines, amelie, gaelle

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What is a computer tifanie, ines, amelie, gaelle

  1. 1. What is a computer ?
  2. 2. <ul><li>I – General presentation
  3. 3. II – Hardware and Software Components
  4. 4. III – The memory
  5. 5. IV – The CPU
  6. 6. V – Conclusion </li></ul>
  7. 7. I – General presentation Screen Keyboard Mouse Scanner or hard disk Printer
  8. 8. II – Hardware and Software Components <ul><li>Hardware :
  9. 9. It's an object or something that you can touch, like screen, printer or mouse. </li></ul><ul><li>Software :
  10. 10. Software is the opposite of the Hardware. You can't touch a software, it's a program like Data. </li></ul>Printer Hotmail Mouse
  11. 11. III – The memory <ul><li>The memory is used to store data and the word «storage » is used for memory on tape or drive.
  12. 12. Some computers use virtual memory, which expands physical memory onto a hard disk. Every computer comes with a certain amount of physical memory, usually referred to as main memory.
  13. 13. A computer that has one megabyte of memory, can hold about one million bytes (or characters) of information. </li></ul>
  14. 14. <ul><li>There are several types of memory: </li></ul><ul><li>RAM (Random – access memory). This is the same as main memory.
  15. 15. ROM (Read – only memory)
  16. 16. PROM (Programmable read – only memory) A PROM is a memory chip on which you can store a program.
  17. 17. EPROM (Erasable programmable read – only memory)
  18. 18. EEPROM (Electrically erasable programmable read – only memory) is a special type of PROM that can be erased by exposing it to an electrical charge. </li></ul>
  19. 19. IV – The CPU <ul><li>The CPU is the abbreviation for Central Processing Unit. The CPU is the brains of the computer. In terms of computing power the CPU is the most important element of a computer system.
  20. 20. On large machines, CPU's require one or more printed circuit boards. On personal computers and small workstations, the CPU is housed in single chip called a microprocessor.
  21. 21. The CPU itself is an internal component of the computer. </li></ul>
  22. 22. <ul><li>The CPU is inserted directly into a CPU socket, pin side down, on the motherboard.
  23. 23. Two typical components of a CPU are the following: </li><ul><li>The arithmetic logic unit ( ALU ), which performs arithmetic and logical operations.
  24. 24. The control unit ( CU ), which extracts instructions from memory and decodes and executes them, calling on the ALU when necessary. </li></ul></ul>
  25. 25. <ul><li>In conclusion the computer is an easy to use tool which has a more or less important memory capacity according to computers.
  26. 26. The computer has material components like the printer as well as non material components like Windows software.
  27. 27. The computer evolves more and more with wireless keyboard, mousse, touch screen. </li></ul>V - Conclusion

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