Commercial Operating System: Difference between revisions

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{{Short description|Product by Digital Equipment Corporation}}

{{citation style|date=March 2018}}

{{Infobox OS

| name = Commercial Operating System (COS)<!-- Name of program or distribution -->

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

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

| released = 1972<ref name=D1957></ref>

| 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 -->

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| ui =

| license = [[Proprietary software|Proprietary]]

| preceded by = [[MS/8]]

| succeeded by =

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

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|author=Binh Nguyen}}, citing {{cite web |title=QUECID |url=http://www.tldp.org/LDP/Linux-Dictionary/html/index.html}}</ref>

They supported the use of [[DIBOL]], a programming language combining features of [[BASIC]], [[FORTRAN]] and [[COBOL]].<ref>{{cite newspapernews |newspaper=Computerworld |date=July 30, 1975 |url=https://books.google.com/books?id=jT2fQqJplN8C&pg=PT29 |title=Time-Sharing Uses Emphasized For DEC Datasystem 350 Series |page=19|quote=Dibol Under COS: The series operates under the Commercial Operating System (COS) 350, which provides timesharing with a high-speed response.}}</ref> COS also supported [[IBM RPG]] (Report Program Generator).<ref name=D1957>{{cite book

|title=DIBOL under COS}}|quote=Dibol Under COS: The series operates under the Commercial Operating System (COS) 350, which provides timesharing with a high-speed response.}}</ref> COS also supported [[IBM RPG]] (Report Program Generator).<ref name=D1957>{{cite book

|title=DIGITAL EQUIPMENT CORPORATION - Nineteen Fifty-Seven To The Present

|url=http://s3data.computerhistory.org/pdp-1/dec.digital_1957_to_the_present_(1978).1957-1978.102630349.pdf

|date=19751978 |publisher=Digital Equipment Corporation}}</ref>

==Implementations==

The Commercial Operating System was implemented to run on hardware from the PDP-8<ref name=HandB.8e>{{cite book

|title=PDP 8/e Small Computer Handbook

|date=1973 |publisher=Digital Equipment Corporation|pages= 2-19 thru 2-20}}</ref> and PDP-11 familyfamilies.

===COS-310===

'''COS-310''' was developed for the PDP-8 to provide an operating environment for [[DIBOL]]. A COS-310 system was purchased as a package which included a desk, VT-52[[VT52]] VDT (Video Display Tube), and a pair of eight inch floppy drives. It could optionally be purchased with one or more 2.5 MB removable media hard drives. COS-310 was one of the operating systems available on the [[DECmate II]].<ref>{{efn|the other was [[WPS-8]].</ref><ref>}}{{efn|There was a product named COS-300, and some DEC manuals are named with both 300 & 310.</ref>}}

Unlike under [[TSS/8]], where each user had only a 4K virtual machine, on COS, each user had (up to) a virtual 32K.<ref>"Multiple users of a Digital Equipment Corp. PDP-8 can each have a virtual machine with 32K words of memory running under.. COS-300.. {{cite magazine

|magazine=Computerworld |date=August 15, 1977

|title=COS-300 |url=https://books.google.com/books?id=p5mHeKTvE5sC}}</ref>

===COS-350===

'''COS-350''' was developed to support the PDP-11 [[porting|port]] of DIBOL, and was the focus for some vendors of [[turnkey]] software packages.<ref>{{cite newspapernews |newspaper=Computerworld |date=July 30, 1975

|url=https://books.google.com/books?id=jT2fQqJplN8C &pg=PT29 |title=Time-Sharing Uses Emphasized For DEC Datasystem 350 TurnkeySeries Payroll Package|page=19}}</ref>

Pre-COS-350, a PDP 11/05 single-user batch-oriented implementation was released; the multi-user PDP 11/10-based COS came about 4 years later.<ref name=D1957/> The much more powerful PDP-11/34 "added significant configuration flexibility and expansion capability."{{rp|p.69}}

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* [[Comparison of operating systems]]

* [[Timeline of operating systems]]

==Notes==

{{notelist}}

==References==

{{Reflist}}

{{Digital Equipment Corporation}}

{{DEC operating systems}}

{{Time-sharing operating systems}}