1.2 memory V2

1.2 memory V2

1. Main memory

   • Ram
     • Random Access Memory
       • recently used data
         • likely to be used again
     • ram is needed for recently used instructions/data
   • Rom
     • Read Only Memory
       • data can not be changed
         • read only
     • rom is needed so permanent data can be retrieved and used again and again
   • can hold a lot of data
   • can hold more then one program at once
     • multi-function
   • works fast
     • clock speed

2. secondary storage

   • Hard disks
     • Magnetic disk that holds a large amount of storage
       • larger then others
   • Flash memory
     • Memory that keeps data without power
       • internal
   • works slow
   • can hold a lot of data