uniti the information in main memory can be displayed through an output device inputis the process of entering data and instructions into the computer various input devices used are keyboardmousescannertrackball etc storageis the process of storing data and instructions in the computer computer has two types of storage areas the architecture or structure of computer is as shown below primary storage is also known as main memory directly accessible to the cpu at very fast speed used to store dataprogramsintermediate and final results very expensive therefore limited in capacity volatile as soon as computer is switched offthe information stored in it gets erased secondary storagealso known as secondary memory or auxiliary memory it is cheapernon-volatile and used to permanently store data and programs department of csevishnu institute of technology