Commercial Operating System

Short description: Product by Digital Equipment Corporation

Commercial Operating System (COS)Developer| Digital Equipment Corporation

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Initial release| 1972[1]
Available in| English
Platforms| PDP-8, PDP-11, DECmate II
License| Proprietary
Preceded by| MS/8

Commercial Operating System (COS) is a discontinued family of operating systems from Digital Equipment Corporation.[2]

They supported the use of DIBOL, a programming language combining features of BASIC, FORTRAN and COBOL.[3] COS also supported IBM RPG (Report Program Generator).[1]

## Contents

* 1 Implementations
* 1.1 COS-310
* 1.2 COS-350
* 2 See also
* 3 Notes
* 4 References

## Implementations

The Commercial Operating System was implemented to run on hardware from the PDP-8[4] and PDP-11 families.

### 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, 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.[lower-alpha 1][lower-alpha 2]

### COS-350

COS-350 was developed to support the PDP-11 port of DIBOL, and was the focus for some vendors of turnkey software packages.[5]

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.[1] The much more powerful PDP-11/34 "added significant configuration flexibility and expansion capability.": p.69

## See also

* Comparison of operating systems
* Timeline of operating systems

## Notes

1. ↑ the other was WPS-8
2. ↑ There was a product named COS-300, and some DEC manuals are named with both 300 & 310.

## References

1. ↑ 1.0 1.1 1.2 DIGITAL EQUIPMENT CORPORATION - Nineteen Fifty-Seven To The Present. Digital Equipment Corporation. 1978. http://s3data.computerhistory.org/pdp-1/dec.digital_1957_to_the_present_(1978).1957-1978.102630349.pdf.
2. ↑ Binh Nguyen. Linux Dictionary. p. 424. https://books.google.com/books?id=vdZWBQAAQBAJ. , citing "QUECID". http://www.tldp.org/LDP/Linux-Dictionary/html/index.html.
3. ↑ "Time-Sharing Uses Emphasized For DEC Datasystem 350 Series". Computerworld: p. 19. July 30, 1975. https://books.google.com/books?id=jT2fQqJplN8C&pg=PT29. "Dibol Under COS: The series operates under the Commercial Operating System (COS) 350, which provides timesharing with a high-speed response."
4. ↑ PDP 8/e Small Computer Handbook. Digital Equipment Corporation. 1973. pp. 2-19 thru 2-20.
5. ↑ "Time-Sharing Uses Emphasized For DEC Datasystem 350 Series". Computerworld: p. 19. July 30, 1975. https://books.google.com/books?id=jT2fQqJplN8C&pg=PT29.

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