Input: the transferring of information into a computer system - for our purposes this will be accomplished when you, the programmer, type source code at the keyboard or open a previously typed program.
Processing: the manipulation and control of information within the computer system. Such manipulations are handled by the Control Unit, the Arithmetic Logic Unit and Temporary Storage.
Storage: the means by which information can be "permanently" saved (until such time as you wish to delete it). This usually occurs on a hard drive, a diskette or a CD.
Output: the displaying of information - for our purposes this will be accomplished when your program displays information on the monitor or printed on paper.
| 
