The computer needs a space to store the information when it is not being processed and that’s because the central processing unit works upon small bits of information at one point. Computers internal memory is in the form of two types of silicon chips. One is RAM i.e. Random Access Memory which stores the information temporarily. Computer can write the information on them and read it and later if required delete it as well. Every time the computer is switched off the RAM is erased. Computers permanent memory is stored in Read Only Memory chip. ROM stores the instructions required by the central processing unit when u first turn on the computer. Although these are very simple things but for some beginners they go a long way in knowing about a computer and its memory.