Editing Compatible Time-Sharing System (section)

==Applications==
===DOTSYS and BRAILLEMBOSS===
The first version of the DOTSYS [[braille]] translation software ran on CTSS and could output to a BRAILLEMBOSS braille page printer.<ref>{{cite journal |last1=Mann |first1=Robert W |date=October 1986 |title=Selected Perspectives on a Quarter Century of Rehabilitation Engineering |url=https://books.google.com/books?id=pxte14KRBokC&q=%22subsequently%20called%22 |journal=[[Journal of Rehabilitation Research and Development]] |volume=23 |issue=4 |pages=1–6 |pmid=3820117 |access-date=March 13, 2022 |quote=The modular software program for braille translation and automatic management of input and output modes, subsequently called "DOTSYS" was underway... |archive-date=September 20, 2023 |archive-url=https://web.archive.org/web/20230920214023/https://books.google.com/books?id=pxte14KRBokC&q=%22subsequently%20called%22 |url-status=live }}</ref><ref>{{cite web |url=https://files.eric.ed.gov/fulltext/ED074663.pdf |title=Final Report Development and Demonstration of Communication Systems for the Blind and Deaf/Blind. Braille Communication Terminals and Tactile Paging Systems. |last=Dalrymple |first=George F. |date=February 26, 1973 |publisher=The Sensory Aids Evaluation and Development Center Massachusetts Institute of Technology |access-date=March 13, 2022 |archive-date=June 25, 2024 |archive-url=https://web.archive.org/web/20240625150301/https://files.eric.ed.gov/fulltext/ED074663.pdf |url-status=live }}</ref>  DOTSYS on CTSS was first demonstrated on August 18, 1966, as part of a feasibility study where teletypesetter tape, in the form of news, was converted to Grade 2 Braille. The following month the feasibility of converting textbook information on teletypesetter tape to error-free Grade 2 Braille was successfully demonstrated.<ref>{{cite report |url=https://files.eric.ed.gov/fulltext/ED015609.pdf |title=Evaluation and Development of Sensory Aids and Devices. Final Report |author=<!--Not stated--> |date=April 3, 1967 |website= |publisher=The Sensory Aids Evaluation and Development Center Massachusetts Institute of Technology |access-date=March 13, 2022 |quote=Demonstration on CTSS of teletypesetter-to-Grade 2 Braille |archive-date=June 25, 2024 |archive-url=https://web.archive.org/web/20240625150302/https://files.eric.ed.gov/fulltext/ED015609.pdf |url-status=live }}</ref> As MIT CTSS was an academic system, a research vehicle and not a system for commercial computing, two years later a version of DOTSYS stripped of CTSS dependencies for software portability was used on an IBM 709 at the [[American Printing House for the Blind]] to print the first braille edition of a book produced from teletypesetter input, only a few weeks after the ink-print version.<ref>{{cite report |url=https://files.eric.ed.gov/fulltext/ED031016.pdf |title=Final Report to Social Rehabilitation Administration Department of Health, Education and Welfare Washington, D.C. |author=<!--Not stated--> |date=April 30, 1969 |publisher=The Sensory Aids Evaluation and Development Center Massachusetts Institute of Technology |access-date=March 13, 2022 |quote=These programs, originally written to operate on the CTSS system at M.I.T., were modified for the 709 at the American Printing House for the Blind. This involved rewriting those parts of the programs which were CTSS-dependent.}}</ref> The following year, on CTSS, a demonstration of printing mathematical tables in braille was shown.  A short FORTRAN II program was written to produce a conversion table from inches to millimeters in braille via the BRAILLEMBOSS braille page printer.<ref>{{cite report |url=https://files.eric.ed.gov/fulltext/ED074663.pdf |title=Conversion Table, Inches to Millimeters a Braille Computer Generated Mathematical Table |author=<!--Not stated--> |date=August 14, 1970 |publisher=The Sensory Aids Evaluation and Development Center Massachusetts Institute of Technology |access-date=March 13, 2022}}</ref>

===Intrex===
[[File:Intrex on CTSS.png|thumb|Diagram of the Intrex running on CTSS]]
The Intrex Retrieval System ran on CTSS. Intrex was an experimental, pilot-model machine-oriented bibliographic storage and retrieval system with a database that stored a catalog of roughly 15,000 journal articles. It was used to develop and test concepts for library automation.<ref>{{cite report |url=https://files.eric.ed.gov/fulltext/ED056732.pdf |title=Project Intrex - A Brief Description |last=Overhage |first=Carl F. J. |date=1971 |website=[[Education Resources Information Center|ERIC]] |publisher=MIT |access-date=March 8, 2022}}</ref><ref>{{cite report |url=https://files.eric.ed.gov/fulltext/ED070506.pdf |title=Intrex Buffer-Controller Display System Operation and Software |last=Kehr |first=James E. |date=September 1972 |website=[[Education Resources Information Center|ERIC]] |publisher=MIT |access-date=March 8, 2022 |archive-date=June 25, 2024 |archive-url=https://web.archive.org/web/20240625150302/https://files.eric.ed.gov/fulltext/ED070506.pdf |url-status=live }}</ref><ref>{{cite report |url=https://files.eric.ed.gov/fulltext/ED057829.pdf |title=The Intrex Retrieval System Software |last=Hurlburt |first=Charles E. |date=September 15, 1971 |website=ERIC |publisher=MIT |access-date=March 8, 2022 |archive-date=June 25, 2024 |archive-url=https://web.archive.org/web/20240625150302/https://files.eric.ed.gov/fulltext/ED057829.pdf |url-status=live }}</ref> A deployment of three BRISC [[Cathode-ray tube|CRT]] consoles for testing at the MIT Engineering Library showed that it was preferred over two other systems, ARDS and DATEL.<ref>{{cite report |url=https://files.eric.ed.gov/fulltext/ED060899.pdf |title=Project Intrex. Semiannual Activity Report, 15 September 1971 - 15 March 1972. |id=Intrex PR-13 |last=Overhage |first=Carl F. J. |date=March 15, 1972 |website=ERIC |publisher=MIT |access-date=March 17, 2022 |quote=Since September 27, 1971, the BRISC has been available at the Engineering Library station on a two-hours a day basis. |archive-date=June 25, 2024 |archive-url=https://web.archive.org/web/20240625150303/https://files.eric.ed.gov/fulltext/ED060899.pdf |url-status=live }}</ref>