(medicine) Coeliac disease.

(Canadian military) A members of the Canadian Forces that is not a commissioned officer; includes warrant officers, non-commissioned officers and privates.

(art) perception of an object without known points of reference.

plural of persona non grata

Service in a non-military organisation, instead of serving in the military. Service done by conscientious objector.

plural of non-player character

(computing theory) A symbol in a formal grammar that cannot appear in sentences of the grammar but may eventually be resolved into a sequence of terminal symbols.

(computing) A requirement of a piece of software, such as accessibility or portability, that is not a specific, measurable aspect of performing a particular task.

(linguistics) Someone who has another native tongue than the language being used.

(law, business) A contract that enjoins a party not to disclose certain information.