Systems Technology, Inc. (STI) is a company that provides research, engineering consulting, and product development services. Its products include Fused Reality, a technology platform for mixed-reality training; the PARASIM, an interactive training simulator; and STISIM Drive, the driving simulator for research, patient assessment, rehabilitation, and fleet training. The company also offers engineering audits, dynamics and control, active pilot cueing, aeroservoelasticity, flight test, and other related services. STI caters to the aerospace, clinical, and defense sectors.