This complete hardware and software tracking system is designed to be easily integrated into existing equipment for access control, cashless vending, time and attendance and event tracking in harsh environments or remote locations. Called Tracker, the system is used to automate industrial and commercial processes, simplifies equipment operation, increase billing efficiency and decreases operating costs. The system is also easy to adapt for network use based upon user requirements. The Tracker three-component system consists of a Tracker controller, Windows-compatible system software, and firm's rugged serial memory keys. The system is programmable, expandable and PC/104 compliant to work with other PC/104 compliant devices. Users can integrate features such as Ethernet cards, modems and LCD keypads.