Tachyon Networks sells speed. No. Not that kind of speed. The company takes its name from a term from physics that describes a particle that is able to travel faster than the speed of light. Tachyon provides broadband satellite services -- including remote Internet access, virtual private networks (VPNs), and emergency network backup -- to business and government clients. Large enterprises in such industries as energy, construction, and real estate use its service to connect to employees, customers, and suppliers who are beyond the reach of traditional wired networks. The company also serves US military agencies, including the Naval Criminal Investigative Service and the US Army.