Corbató, Fernando J. ; et al. (1963). The Compatible Time-Sharing System A Programmer's Guide(PDF). MIT Press. ISBN978-0-262-03008-3. „Shortly after the first paper on time-shared computers by C. Strachey at the June 1959 UNESCO Information Processing conference, H. M. Teager and J. McCarthy at MIT delivered an unpublished paper "Time-shared Program Testing" at the August 1959 ACM Meeting.”