Commercial Operating System: Difference between revisions

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'''COS-3xxCommercial Operating System''' (Commercial'''COS''') Operatingis System)a wasdiscontinued thefamily nameof used[[operating bysystem]]s from [[Digital Equipment Corporation]].<ref>{{cite forbook a|title=Linux familyDictionary of [[operating|page=424 system]]s|url=https://books.google.com/books?id=vdZWBQAAQBAJ

<ref>{{cite book |title=Linux Dictionary |page=424 |url=https://books.google.com/books?id=vdZWBQAAQBAJ

|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>"Dibol Under COS: The series operates under the Commercial Operating System (COS) 350, which provides timesharing with a high-speed response." {{cite newspaper |newspaper=Computerworld |date=July 30, 1975 |url=https://books.google.com/books?id=jT2fQqJplN8C

|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|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

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==Implementations==

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

|title=PDP 8/e Small Computer Handbook

|date=1973 |publisher=Digital Equipment Corporation}}</ref>{{rp|pp.pages= 2-19 thru 2-20}}</ref> &and PDP-11 family.

===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 VDT (Video Display Tube), and a pair of eight inch floppy drives. Optionally youIt could purchaseoptionally be purchased with one or more 2.5 MB hard drives that had removable media hard drives. COS-310 was one of the operating systems available on the [[DECmate#DECmate II|DECmate II]].<ref>the other was [[WPS-8]].</ref><ref>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

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===COS-350===

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

|url=https://books.google.com/books?id=jT2fQqJplN8C |title=Datasystem 350 Turnkey Payroll Package}}</ref>