Computer Systems

Computer Systems

1. Importance of computers

2. Professional standards

3. Ethical, environmental and legal considerations

4. Information

   • Hardware
     • Physical components
     • EX. keyboard and scanners
   • Software
     • Means the program Including both the operating system and any application software
     • EX. spreadsheet and presentation software
   • Input
     • Devices used to put data into the computer
     • EX. mouse and webcams
   • Output
     • Devices that allow data to be sent beyond the computer, usually to a human user
     • EX. speakers and monitors
   • CPU
     • Component that performs calculations and fetches and executes program instructions
     • Fetch-Execute-Decode cycle
   • Storage devices
     • Used to contain programs and data
     • EX. USB flash drives and internal hard disk drives
   • Embedded system
     • Computer integrated into another device
     • EX. mobile phones and washing machine