for Terminal Oriented Social Science
from Multics history:
"The Cambridge Project was an ARPA-funded political science computing project. (Given the nature of the research, the funds probably came from one of the security agencies, and were channeled through ARPA.) They worked on stuff like survey analysis and simulation, led by Prof. Ithiel de Sola Pool, J. C. R. Licklider and Douwe B. Yntema. Yntema had done a system on the MIT Lincoln Labs TX-2 called the Lincoln Reckoner, and in the summer of 1969 led a Cambridge Project team in the construction of an experiment called TOSS). TOSS was sort of like Logo, with matrix operators. Its big feature was multiple levels of undo, back to the level of the login session. This feature was cheap on the Lincoln Reckoner, but absurdly expensive on Multics."