OCR Computer Science: Computer Systems

OCR Computer Science: Computer Systems

1. Hardware

   • Physical components.
     • keyboard
     • mouse
     • monitor
     • anything you can touch

2. Software

   • the progams
     • operating systems
     • application software
       • e.g. spreadsheet software
       • word processing software
         • never say 'word' or 'PowerPoint' in the exam

3. Input

   • devices are used to put data into the computer
     • keyboards
     • mice

4. Output

   • devices allow data to be sent beyond the computer, usually to a human user
     • monitors
     • speakers
     • printers

5. CPU

   • Central Processing Unit
   • components that performs calculations and executes program instructions.

6. Storage

   • devices which contain data and programs
     • USB flash drives
     • DVD drives
     • internal hard disk drives

7. Embeded Systems

   • a computer integrated into another device
     • a mobile phone
     • washing machine
     • peterol pump
     • television

8. Application of Computers

   • Safety
   • Travel
   • Business
   • Education
   • Retail
   • Entertainment
   • Communication

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