NCO
Meaning of NCO in English
/ ˌen siː ˈəʊ; NAmE ˈoʊ/ abbreviation
non-commissioned officer (a soldier who has a rank such as corporal or sergeant )
Oxford Advanced Learner's English Dictionary.
Оксфордский английский словарь для изучающик язык на продвинутом уровне.
2005