Computer Science - AS Level

Hardware

4.1 Input, output and storage devices

• Hardware Presentation
  • Brief overview of hardware and software (wikibooks)
  • Brief overview of Input/Output (I/O) devices (wikibooks)
  • Notes including keyboard, laser mouse, scanner (wikibooks)
  • Notes on trackerball (wikipedia)
  • Notes on Sensors (wikipedia)
  • Notes on Actuators (wikipedia)
  • Notes including inkjet printer, laser printer, speakers (wikibooks)
  • Notes including hard disk, optical disks, flash memory (wikibooks)
  • Notes on data storage (primary and seconday) (wikipedia)
  • Computer System Page from IGCSE ICT
    • Use this page's external links for extra research.
      • Hardware Definitions Quiz
      • Hardware Uses Quiz

4.2 Main memory

• Main Memory Presentation
  • Notes on how to check type of memory in your computer (ehow)
  • Definition of computer memory (ehow)
  • How RAM works (howstuffworks)
  • Different types of RAM (howstuffworks)
  • Difference between static and dynamic RAM (howstuffworks)
  • ROM and RAM notes (howstuffworks)
  • Different types of RAM2 (ehow)
    • Main Memory Quiz

4.3 Logic gates and logic circuits

• BBC Bitesize Logic Gates
  • There are some nice animations on this site, particularly the one at the bottom of page 3 (click Next at the bottom of the page) which quickly shows the effects of different gates - just click a gate!
• Logic Gates (Symbols) - Wikipedia
• Accumulator - Wikipedia
• The Logic Lab (recommended by Stergios)
  • Notes on logic gates and simple exercises (wikibooks)
  • Exercises on simple gate combinations (wikibooks)
  • Exercises on building circuits (wikibooks)
  • Logic circuit simulator (cedarlogic)
  • Mr Clarkson talks about binary logic1 (youtube)
  • Mr Clarkson talks about binary logic2 (youtube)
  • Mr Clarkson talks about binary logic3 (youtube)
    • Logic Gates Quiz