Ad blocker interference detected!
Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers
Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.
Founded in 1986, the Corporation for Open Systems (COS) was a non-profit R&D consortium formed to deal with testing and other operational issues relating to OSI protocols. It closed 10 years later.