Memory and Storage

Memory and Storage

1. Read Only Memory

   • non-volatile
   • firmware
     • built in
     • permanent
   • what does it do?
     • includes instructions stored by the manufacturer
       • instructions on how to start a computer
       • access the built in hardware such as the hard drive and load the operating system into RAM

2. Random Access Memory

   • Volatile
   • holds data and instructions currently running

3. Secondary Storage

   • Optical Storage
     • cheap
     • Microscopic dots
     • portable
     • data cannot be edited or deleted
   • Solid State Storage
     • no moving parts
     • referred to as flash drives
     • fast read/write times, silent
     • resistant to knocks
     • expensive
     • usb drives
     • sd card
     • camcorders
   • Magnetic Storage
     • magnetic film divided to billions of areas
     • silver coloured disks
     • fast access
     • cheap
     • large capacity
     • not portable
     • damaged easily

4. Virtual Memory

   • temporary space
   • stored in secondary storage
     • non-volatile
     • It is used to keep programs and data indefinitely.
     • long term

5. Flash Memory

   • easy, fast info storage
     • computers
     • digital cameras
     • video game consoles

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