Memory

Memory

1. Ram

   • Random access memory
   • Volatile
     • This means that the data is not stored when the computer system is turned off
   • Stores the instructions and data that are needed while programs are being used.
   • RAM is a fast temporary type of memory in which programs, applications and data
     • are stored

2. Rom

   • Read only memory
   • Non volatile
     • This means the data IS stored when the device is turned off
   • Stores the instructions that are needed to 'boot up' the computer.
   • Rom retains its memory even after the computer is turned off.

3. Virtual memory

   • Virtual memory is used when ram is full.
     • [temporary ram]
   • Part of secondary storage is used as this.
     • The data from RAM is moved to the secondary storage to make space for new data in ram.
   • When data in virtual memory is needed, it is moved back to ram.