COMPATIBLE TIMESHARING SYSTEM
\kəmpˈatəbə͡l tˈa͡ɪmʃe͡əɹɪŋ sˈɪstəm], \kəmpˈatəbəl tˈaɪmʃeəɹɪŋ sˈɪstəm], \k_ə_m_p_ˈa_t_ə_b_əl t_ˈaɪ_m_ʃ_eə_ɹ_ɪ_ŋ s_ˈɪ_s_t_ə_m]\
Definitions of COMPATIBLE TIMESHARING SYSTEM
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(CTSS) One of the earliest (1963)experiments in the design of interactive time-sharingoperating systems. CTSS was ancestral to Multics, Unix,and ITS. It was developed at the MIT Computation Centerby a team led by Fernando J. Corbato. CTSS ran on a modifiedIBM 7094 with a second 32K-word bank of memory, using two2301 drums for swapping. Remote access was provided to upto 30 users via an IBM 7750 communications controllerconnected to dial-up modems.The name ITS (Incompatible time-sharing System) was a hackon CTSS, meant both as a joke and to express some basicdifferences in philosophy about the way I/O services should bepresented to user programs.
By Denis Howe