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Topic: Compatible Time Sharing System

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	Time-sharing - Wikipedia, the free encyclopedia
		But because computers in interactive use often spend much of their time idly waiting for user input, it was suggested that multiple users could share a machine by using one user's idle time to service other users.
		CTSS has a good claim to be the first time-sharing system and remained in use until 1973.
		The first commercially successful time-sharing system, and the one which became the most widespread in the late 1960s and early 1970s, was the Dartmouth Time-Sharing System (DTSS) which was first implemented at Dartmouth College in 1964 and subsequently formed the basis of General Electric's computer bureau services.
	en.wikipedia.org /wiki/Time-sharing (438 words)

	retro
		Besides the operating system and its basic utilities, a good deal of interesting software is available, including a sophisticated text-processing system that handles complicated mathematical material [2], and produces output on a typesetter or a typewriter terminal, and a LALR parser-generator [3].
		Seek time, for example, dominates the measured times (because the disks on the PDP-11 transfer one block of data in only.6 millisecond once positioned) and there was no attempt to optimize the placement of the input or output files.
		Because the system overhead per block is 6 milliseconds, most of which is overlapped, it would seem that the overall transfer rate of the copy might be nearly doubled if a block size of 1024 bytes were used instead of 512.
	cm.bell-labs.com /cm/cs/who/dmr/retro.html (8567 words)

	Incompatible Time-Sharing System - Wikipedia, the free encyclopedia
		The Incompatible Time Sharing System (ITS) was developed at the Massachusetts Institute of Technology's AI Lab ([1]) in the late 1960s.
		The name was a takeoff on CTSS, the Compatible Time-sharing System developed by Corbató, Fano et.
		A snapshot of the final file system (except for user pages) can be found at ([4]).
	en.wikipedia.org /wiki/Incompatible_Time-Sharing_System (203 words)

	BSTJ version of C.ACM Unix paper
		In fact, the differences among the various systems is rather small; most of the revisions made to the originally published version of this paper, aside from those concerned with style, had to do with details of the implementation of the file system.
		Early versions of the operating system were written in assembly language, but during the summer of 1973, it was rewritten in C. The size of the new system was about one-third greater than that of the old.
		The system recognizes one particular user ID (that of the ``super-user'') as exempt from the usual constraints on file access; thus (for example), programs may be written to dump and reload the file system without unwanted interference from the protection system.
	cm.bell-labs.com /cm/cs/who/dmr/cacm.html (8703 words)

	CTSS, Compatible Time-Sharing System (Site not responding. Last check: 2007-09-16)
		The "Compatible Time-Sharing System" was an operating system written by a team of MIT programmers led by Prof.
		CTSS originally was presented in a paper at the 1962 Spring Joint Computer Conference, even though the software wasn't quite working.
		CTSS was "compatible" in the sense that FMS could be run in B-core as a "background" user, nearly as efficiently as on a bare machine.
	cis.usouthal.edu /faculty/daigle/project1/ctss.htm (208 words)

	Multics--The first seven years
		Another measure of the system is the size of the resident supervisor which is about 30k words of procedure and, for a 55 user load, about 36k words of data and buffer areas.
		Although reasons for this similarity in time span include the use of a higher level programming language and a somewhat larger staff, the use of CTSS as a development tool for Multics was of pivotal importance.
		The machine presented to both the Multics system programmer and the application system programmer is the one with which we have the most experience; it is the raw material from which one constructs other environments.
	www.multicians.org /f7y.html (7265 words)

	CTSS (Site not responding. Last check: 2007-09-16)
		CTSS may also stand for the Cray Time Sharing System, a separate system developed for Cray supercomputers or the Cambridge Time Sharing System developed for IBM mainframes.
		CTSS used a modified IBM 7094 mainframe computer that had two 32,768 word banks of core memory instead of the normal one.
		href="http://www.worldhistory.com/wiki/I/Incompatible-Timesharing-System.htm">ITS, the Incompatible Timesharing System, another early, revolutionary, and influential MIT time-sharing system, was produced by people who disagreed with the direction taken by Multics; the name was a hack on CTSS, as the name of Unix was later a hack on Multics.
	www.worldhistory.com /wiki/C/CTSS.htm (659 words)

	Maurice V. Wilkes
		The Atlas operating system had been built without much computer support, and one of the contributions of the joint group working on the Titan, as the Cambridge machine was called, was the Titan Supervisor Assembly System.
		This was very early in the field of version control systems, and had a useful feature in that it distinguished two sorts of changes to the source text of a module.
		About that time, though, modern ideas of distributed computing were becoming current, and it was clear that the Ring could serve as a basis for this.
	ei.cs.vt.edu /~history/Wilkes.html (2477 words)

	Fernando J Corbató (Site not responding. Last check: 2007-09-16)
		The CTSS was originally presented in a paper to a computing conference in the spring of 1962 F. Corbató, M. Daggett and R. Daley, "An Experimental Time-Sharing System," Proceedings of the Spring Joint Computer Conference, 21, Spartan Books, Baltimore, 1962, pp.
		As well as the development of the CTSS there were some other interesting developments taking place at the same time, one of these was a machine called the Atlas, which was developed at a similar time to the CTSS.
		During development of the Multics system it was common for Professor Corbató's team to reconfigure the computer to run as two separate computers, one to enable continued use of the system to it's users and the second system for the developers to use to update the system.
	www.benmeadowcroft.com /reports/corbato (4150 words)

	ctss - definition by dict.die.net (Site not responding. Last check: 2007-09-16)
		CTSS Compatible Time Sharing System (Unix, predecessor, OS, MIT)
		An early (1963) experiment in the design of interactive time-sharing operating systems, ancestral to Multics, Unix, and ITS.
		The name ITS (Incompatible Time-sharing System) was a hack on CTSS, meant both as a joke and to express some basic differences in philosophy about the way I/O services should be presented to user programs.
	dict.die.net /ctss (80 words)

	CTSS
		Robert M. Fano, The MAC System: A Progress Report (MIT Project MAC, 1964) describes the usage of CTSS
		John McCarthy, Reminiscences on the History of Time Sharing presents the origin of the concept of time-sharing
		The IBM 7094 and CTSS a fascinating personal memoir of a system programmer on CTSS
	www.brainyencyclopedia.com /encyclopedia/c/ct/ctss.html (434 words)

	CNN - 1961: Learning to share - June 29, 1999
		The first patient-monitoring system is installed at the National Health Institute Clinic in Maryland.
		The most powerful computer of its day, Stretch is a pioneer in supercomputer systems, and many of its innovations will be part of the System/360, to be introduced three years later.
		Encouraged by Morse to pursue the idea, an associate professor named Fernando Corbato and his team developed the Compatible Time-Sharing System (CTSS) in 1961, which was the first demonstration of how time-sharing could be done.
	www.cnn.com /TECH/computing/9906/29/1961.idg (860 words)

	Multics Bibliography
		The TPS document management system (DMS) was designed to provide the environment to create and edit documents as well as to control their configurations, and it is the first step toward becoming an electronic document management system.
		Sharing among users of a computer utility is a type of interaction that may be difficult to provide in a distributed system.
		It is shown that a shortest access time first queue discipline is the most efficient, with the access time being defined as the time required for the drum to be positioned, and is measured from the finish of service of the last request to the beginning of the data transfer for the present request.
	www.multicians.org /biblio.html (11833 words)

	Find in a Library: The compatible time-sharing system; a programmer's guide.
		Find in a Library: The compatible time-sharing system; a programmer's guide.
		To find a library, type in a postal code, state, province, or country.
		WorldCat is provided by OCLC Online Computer Library Center, Inc. on behalf of its member libraries.
	www.worldcatlibraries.org /wcpa/ow/7f05edeb515ec302.html (40 words)

	Charles Babbage Institute: Software History Bibliography, C-F
		Journal of Medical Systems 14 (December 1990): 323-44.
		Dijkstra, Edsger W. “The Structure of the THE Multiprogramming System.” In Classic Operating Systems, ed.
		Dijkstra, Edsger W. “The Structure of the THE Multiprogramming System.” Communications of the ACM 11 (May 1968): 341-6.
	www.cbi.umn.edu /shp/shpcf.html (6659 words)

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