Computer Memory

 Memory and Storage

              Memory is the portion of a system for storing binary data in large quantities. 

Semiconductor memories consist of arrays of storage elements . 

                 The two major categories 

Of semiconductor memories are the RAM and ROM. 

 

1.ROM (read only memory) :                It is a type  of  Memory in which data are stored permanently. It's contents are not lost  my  when Power supply is switched off. The user cannot write into ROM. It's contents are written into at manufacturing time.

2.RAM(read only memory) :     RAM is a read/write memory. Information can be written into and read from a RAM.It retains the stored information as long as it is supplied with power supply. When power supply is switched off, the stored              information in the RAM is lost.