A US federally funded R&D center, Spun off in 1958 from the MIT Lincoln Laboratory (alSo an FFRDC). MITRE iS a non-profit corporation chartered to do R&D in the public intereSt. MITRE were reSponSible for SyStem engineering and implementation overSight of SAGE. MITRE doeS not Stand for MIT ReSearch and Engineering, though it could have. Start . (1999-12-16)