Memory

Memory

1. RAM

   • Random access storage
   • Quicker to read and write than any other storage in a computer
   • Quick access to the data and programs in use
   • Volatile memory
   • Any data on the computer once turned off will be lost
     • All data would be lost

2. ROM

   • Read only memory
   • Contains the programs that allow your computer to 'boot up'
   • Non-volatile memory
   • Data and programs that are stored in ROM are not lost when the computer is turned off
     • Still remain in the ROM when loaded back up
   • Every computer needs this to be able to start up, but is not needed after it has started it up

3. Flash memory

   • A type of flash memory storage device used to store data long-term
   • Non-volatile memory
   • Solid state storage device as no moving parts inside
   • Quicker to read and write from as the computer does not need to need to wait for the device to warm up
   • Flash memory can be found in devices such as -USB memory sticks, SD cards, Solid state drives (SSD)

4. Optical storage

   • Advantages
     • Uses a lens and a light beam to read and write onto a disk
     • Very portable, small and light
     • Very cheap to manufacture
     • Very durable and resulting in them being safe to store data for long periods of time
   • Disadvantages
     • Storage capacity of disks is relatively small compared to others
     • In some cases special disks are required to read/write from a disk

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