Invariant is a company that develops custom software and information technology. It offers a software framework Bullwinkle, a containerized weapon system (CWS), multi-use launcher electronics (MULE), a hostile fire fast locating sensor FireFLY, a hardware accelerated infrared scene generator SgPrime, a laser spot scoring (LSS) system, a remotely controlled weapons station battery and cooling unit (BCU), etc. The company also provides field service engineering, simulation, platform integration, small batch engineering, system integration testing, and other services.