CAPBAK is a test Capture/Playback system which works as a stand-alone product or as part of the fully integrated TestWorks/Regression multi-platform suite of testing tools. CAPBAK captures all user activities during the testing process using three modes: TrueTime, Character Recognition, and Object Oriented modes. Keystrokes, mouse movements, captured bitmap images, widget/object activity and extracted ASCII characters are captured into a test scri`pt. The captured images and characters provide baselines of expected application behavior against which future tests runs are compared. CAPBAK's automatic output synchronization capabilities ensures reliable playback, allowing tests to be run unsupervised as often as required. Also allows record/playback from serial lines on Dumb Terminals using a loopback Null modem.