International Telemetering Conference Proceedings / October 26-29, 1987 / Town and Country Hotel, San Diego, California / The Telemetry Systems Operation (TSO) of CSC in Lompoc, California, has been developing telemetry systems since October 1981. Three major turnkey systems have been developed as well as several smaller derivative systems. Each system, built for a different end-user, was custom fit to support unique requirements and often represented several different techniques for accommodating similar problems within different system architectures. This paper describes the evolution of TM system architectures developed by TSO Lompoc, and the special engineering problems solved in the course of their development to provide the user with accommodating telemetry systems that are responsive, expandable, and cost-effective.