. . . "1983Z"^^ . . . "Trusted Information Systems, Inc."@en . . . "Acquired byMcAfee, later by SPARTA, Inc., which was acquired by Cobham, plc"@en . "Trusted Information Systems (TIS) was a computer security research and development company during the 1980s and 1990s, performing computer and communications (information) security research for organizations such as NSA, DARPA, ARL, AFRL, SPAWAR, and others."@en . . .