STORAGE DEVICE

STORAGE DEVICE

1. MAIN MEMORY

   • RAM
   • ROM
   • stores data being processed by CPU
   • used to store temporarily

2. BACKING STORAGE

   • DIRECT ACCESS DEVICE
     • DVD
     • HARD DISC
   • SERIAL AND SEQUENCE DEVICE
     • TAPE DRIVE
   • THREE TYPES
     • OPTICAL
       • save data as patterns of dots that can be read using light.
     • MAGNETIC
       • store data in the form of tiny magnetised dots
     • SOLID STATE
       • no moving parts
       • based on electronic circuits
   • non-volatile
   • stores permenantly

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