Computer Systems

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Computer Systems

  1. 1. Computer Systems ICT GCSE
  2. 2. The CPU <ul><li>Central Processing Unit </li></ul><ul><li>The ‘brain’ of the computer </li></ul>CPU Backing Storage Output Device Input device
  3. 3. Inside the CPU Backing Storage Input device Output Device ALU (Arithmetic and Logic Unit) Immediate Access Store Control Unit
  4. 4. Typical Computer System Monitor Tower/ Base Unit Keyboard Mouse
  5. 5. Types of Computer <ul><li>Microcomputer </li></ul><ul><li>Mainframe </li></ul>Laptop PC Desktop PC Largest type of computer, can be used by multiple users at one time Designed to be used by one user at a time
  6. 6. Uses <ul><li>PDA (Personal Digital Assistant): To take the place of a diary/address book, make minor change to documents, check e-mail, on the move </li></ul><ul><li>Laptop PC: Any situation where a portable computer is needed </li></ul><ul><li>Desktop PC: Any situation where a computer does not need to be moved </li></ul><ul><li>Mainframe: Used where vast amounts of processing power and storage is needed, ie banks </li></ul>
  7. 7. PC Types Networked PC Connected to a server which it relies on to operate Stand alone PC Will still function fully without any network connection
  8. 8. Hardware <ul><li>The hardware is the equipment that makes up a computer system </li></ul><ul><li>If you can touch it, it’s hardware! </li></ul><ul><li>Examples </li></ul><ul><ul><li>Input and Output Devices </li></ul></ul><ul><ul><li>The CPU </li></ul></ul><ul><ul><li>Storage Devices </li></ul></ul><ul><ul><li>Media (CDs, DVDs etc) </li></ul></ul>
  9. 9. Software <ul><li>Programs which run on the computer system ( hardware ) </li></ul><ul><li>For example a MS Office CD is hardware </li></ul><ul><li>The program stored on it is software </li></ul>

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