The company was a global leader in the application of computer technology to listed derivatives trading. Hull developed a proprietary and large scale reliable distributed system architecture, providing automatic real-time pricing, risk management, market making and interconnection with automated options, futures and stock exchanges as they became available. Hull's massively scalable software technology was deployed to cover both domestic and international markets as electronic, on-line exchanges became available, while innovative hand-held computer technology was employed at exchanges still requiring execution by floor traders.