Convergent Technologies Operating System: Difference between revisions

Revision as of 02:20, 21 January 2019

Revision as of 00:00, 2 June 2019

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{{Refimprove|article|date=April 2007}}

{{Infobox OS

[[File:CTOS-B25.JPG|thumb|250px|A Burroughs B25 computer running CTOS]]

| name = Convergent Technologies Operating System (CTOS)<!-- Name of program or distribution -->

| logo = <!-- filename only (no wikilink, no Image:/File:) -->

| logo caption =

| logo size =

| logo alt =

| screenshot = CTOS-B25.JPG<!-- filename only (no wikilink, no Image:/File:) -->

| caption = A Burroughs B25 computer running CTOS

| screenshot_size =

| screenshot_alt =

| collapsible =

| version of = <!-- For articles about releases of operating systems ONLY -->

| developer = [[Convergent Technologies]]<!-- Name of main developer or sponsor-->

| family = <!-- "Unix-like" or "Microsoft Windows" -->

| working state = Discontinued<!-- "Current", "Discontinued" (operating systems), or "No longer supported" (releases) -->

| source model = <!-- "Open source", "Closed source", or "Shared source" -->

| released = {{Start date and age|1980}}

| discontinued = <!-- DON'T use this for articles about releases of operating systems -->

| RTM date = <!-- {{Start date and age|YYYY|MM|DD|df=yes/no}} ONLY for articles about OS releases -->

| GA date = <!-- {{Start date and age|YYYY|MM|DD|df=yes/no}} ONLY for articles about OS releases -->

| latest release version =

| latest release date =

| latest preview version =

| latest preview date = <!-- {{Start date and age|YYYY|MM|DD|df=yes/no}} -->

| marketing target =

| programmed in = [[PL/M]]

| language = <!-- Supported human languages (English, French, Italian, Arabic, ...) -->

| update model = <!-- APT, Windows Update, etc. -->

| package manager = <!-- dpkg, rpm, Windows installer, etc. -->

| supported platforms = [[x86]]<!-- IA-32, x64, Itanium, ARM, etc. -->

| kernel type = <!-- Hybrid, Monolithic, Microkernel, Exokernel, Nanokernel, etc. -->

| userland =

| ui =

| license = [[Proprietary software|Proprietary]]

| preceded by =

| succeeded by =

| website = <!-- {{URL|www.example.org}} -->

| support status = <!-- For articles about releases of operating systems ONLY -->

| other articles =

| prog_language =

}}

The '''Convergent Technologies Operating System''', also known variously as '''CTOS''', '''BTOS''' and '''STARSYS''', was a modular, [[message-passing]], multiprocess-based [[operating system]].

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==Usage==

[[Convergent Technologies (Unisys)|Convergent Technologies]]' first product was the IWS (Integrated Workstation) based on the [[Intel 8086]] processor, which had CTOS as its operating system. This was a modular operating system with built-in [[local area networking]]. CTOS supported multiple processes or threads, and message-based interprocess communication.

Companies that licensed CTOS included [[Groupe Bull|Bull]] (STARSYS), and [[Burroughs Corporation|Burroughs]] (BTOS) and who later merged with Sperry to become [[Unisys]]. Unisys was the single largest customer with whom Convergent Technologies merged to become one company in 1988. At its peak, CTOS had over 800,000 users worldwide. Diskless workstations (e.g., ''Bull'') used the [[Intel 80186]] processor, a processor seldom used by standard PCs.

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| first = Edna Ilyin

| last = Miller

| author2 = Jim Crook |author3 = June Loy

| title = Exploring CTOS

| publisher = [[Prentice Hall]]

| year = 1991

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*[http://bitsavers.org/pdf/convergent Convergent archive] at bitsavers.org

{{Operating system}}

{{FOLDOC}}

[[Category:Computer-related introductions in 1980]]

[[Category:Discontinued operating systems]]

[[Category:Proprietary operating systems]]

[[Category:Unisys operating systems]]