CB UNIX

In today's world, CB UNIX is a topic that generates a lot of interest and debate. From its origins to the present, CB UNIX has been the object of study and reflection by experts in different areas. Its impact on society, the economy, culture, and even politics, has been significant over time. In this article, we will explore different aspects related to CB UNIX, analyzing its relevance in the current context and its possible influence in the future. In addition, we will examine the various perspectives and opinions that exist around CB UNIX, with the aim of offering a broad and complete vision on this topic.

Columbus UNIX / CB UNIX
DeveloperBell Labs
Written inC
OS familyUnix
Working stateDiscontinued
Available inEnglish
Default
user interface		Command-line interface

Columbus UNIX, or CB UNIX, is a discontinued variant of the UNIX operating system used internally at Bell Labs[1] for administrative databases and transaction processing.[2] It was developed at the Columbus, Ohio branch, based on V6, V7 and PWB Unix.[3] It was little-known outside the company.

CB UNIX was developed to address deficiencies inherent in Research Unix, notably the lack of interprocess communication (IPC) and file locking, considered essential for a database management system. Several Bell System operation support system products were based on CB UNIX such as Switching Control Center System. The primary innovations were power-fail restart, line disciplines, terminal types, and IPC features.[4]

Volumes 1 and 2 of the UNIX Programmer's Manual, CB Version

The interprocess communication features developed for CB UNIX were message queues, semaphores and shared memory support. These eventually appeared in mainstream Unix systems starting with System V in 1983, and are now collectively known as System V IPC.[2]

References

  1. ^ Rochkind, Marc (1985). Advanced UNIX Programming. Prentice Hall. pp. 156–157. ISBN 0-13-011800-1.
  2. ^ a b Kerrisk, Michael (2010). The Linux Programming Interface. No Starch Press. p. 921. ISBN 9781593272203.
  3. ^ J. D. Doan, ed. (May 1981). CB-UNIX Programmer's Manual, Edition 2.3 (PDF). Columbus, OH: Bell Telephone Laboratories. p. iii.
  4. ^ Dale Dejager (1984-01-16). "UNIX history". Newsgroup: net.unix.
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