Computers: Computer-aided engineering: Terminals that simulate, test, and debug logic designs promise to change radically the way designers do their jobs

The development of computer-aided engineering (CAE) is discussed. Engineering work stations now available on the market provide tools to: simulate circuits that have been drawn, draw circuit designs on a screen by means of a graphics tablet, keep track of different stages of a design so that several designers working on different modules will all be using the proper version of each module, and integrate graphics with text documentation. Simulators are most commonly used to help design large systems, where the cost of building prototypes and debugging them justifies extensive design verification.