Abstract: Equipment for testing computer peripherals is disclosed having a computer, with keyboard and display, for coupling to such peripherals by way of a peripheral connector, the computer being provided with software defining test and exercising routines for operating a peripheral device in a controlled and monitorable manner. The computer has a central processor coupled to a bus system to which is connected a monitor, inter alia defining key functions of the keyboard. The bus system also is connected by way of the peripheral connector to an interface to interface between the computer and various peripheral devices. The computer is a portable microprocessor system provided with plug-in modules containing the software as firmware to define the test and exercising routines required for different peripheral devices.