cos. [1] Cooporation for Open Systems - nichtkommerzielles multinationales Konsortium von Computerbenutzer und -vertreiber über 1.)-Konformität

[2] Class of Service

[3] Concurrent Operating System (UNIVAC)

[4] Compatible Operating System

[5] Central Office Switch

[6] Carry-on Oxygen System (->"NASA Acronym List") {Weltraumfahrt}

[7] CheckOut Station (->"NASA Acronym List")

[8] Console Operating System (->"NASA Acronym List")

[9] Card Operating System (->"c't8/00")

[10] (Web) Cache Object Store

[11] Colorado Springs, CO, USA -internationale Fughafen-Kennung