Programs

Type of Program	Input	What the Program Does	Output
Word processor	Characters you type from the keyboard	Formats the text; corrects spelling	Displays and prints neatly organized text
Game	Keystrokes or joystick movements	Calculates how fast and far to move a cartoon figure on-screen	Moves a cartoon figure on-screen
Stock-market predictor	Current and past prices for stocks	Tries to recognize trends in a stock's price fluctuations	Predicts the future price of a stock
Missile guidance program	Current location of the missile and the target	Calculates how to make the missile's location and the target's location coincide	Corrects the trajectory so that it stays aimed at the target
Optical character recognition (OCR)	Text from a scanner	Recognizes shapes of characters	Converts scanned text into a text file that a word processor can edit
Web browser	HyperText Markup Language (HTML) codes on other computers	Converts the HTML codes into text and graphics	Displays Web pages on-screen