Operating system

Operating system

1. Manages Resources

   • Peripherals such as Input/output
     • Sends data to output devices
       • Moniter
       • Printers
       • Speaker
     • Receives data to output devise
       • Mouse
       • Keyboard
       • Touch screen
   • Printing using spooling
     • Data is stored on disc/in queue
       • Document is printed when in printer is free
     • Users can work while waiting for job to print
   • Backing storage
     • Creates and maintains filing system
     • Data can be retrieved from any disk drive
     • Organises file in a hierarchical structure
   • RAM
     • Programs wont corrupt each other
     • programs are stored in the correct locations
   • Process
     • Ensures that different process utilize the CPU
     • Can ensure that all task are running simultanneously
   • Security
     • Creation of accounts
     • Logon and change password

2. File compressions

   • The amount of data is reduced
   • This is used to save disk space

3. Disk de-fragmention

   • fragmented files are split up and stored on different parts of the disk
     • This will slow down disk access speed
   • Disk de-fragmentation is when file parts are re- arranged

4. Computers