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1. desktop devices

   • Windows
   • Mac OS
   • Linux
   • unix

2. portable devices

   • IOS
   • android
   • Chrome os

3. functions:

   • Managing Resources
     • Processes
     • Peripherals
     • Memory
   • Provide an interface
     • each devices has different parts
       • an OS talks to them to allowing Softwere them to work

4. managing resources

   • file compression
   • backing store
   • printing
     • spooling
   • peripherals
     • drivers
       • Software used to map commands to the individual peripherals
     • input and output Devices
       • keyboard
       • mouse