IPO

INPUT is the data flowing into the system from outside.
E.G: A person types data into a database system by means of a keyboard
PROCESSING is the action of manipulating the input into a more useful form.
E.G:The keystrokes being entered by the typist is converted into ASCII format that the computer can understand.
OUTPUT is the information flowing out of the system
E.G:The keystrokes being entered are immediately shown on the typist’s monitor so she can see what is being entered