The document is applicable to the use of interaction devices for electronically controlled machinery. Interaction devices is the generic term used for devices that allow the transfer of information from the user to the computer and from the computer to the user. The form of information transfer influences th design of the user interface as well as the technologies used. It deals with interaction devices for manual operation: Mouse, trackball, joystick, mouse button, mouse pad, mouse stick, digitizing tablet, touch screen and keys.