Founded in 1982, Colby Systems Corporation is a supplier of Digital Video Recorders (DVR). Based in Palo Alto, Calif., the company introduced the worlds first Disk Operating System (DOS) portable computer and in 1988 it designed the first battery powered pocket computer, the Pocket Info Pac. Colby Systems Corporation offers a wide range of products, such as cellular security cameras, airport security system, casino digital video recorder and police car DVR/computer among others. The firm caters to the needs of Police, Airport and Casino markets.