(computing) Initialism of Network File System. / (video games) Initialism of Need for Speed.

Initialism of not for sale.

(Canada) Initialism of Newfoundland and Labrador, a Canadian province. / (US, pharmacology) Initialism of National Formulary, a book of public pharmacopeial standards.

(slang) Initialism of not frat, denoting things counter to the culture of Greek life, particularly in the Southern United States

(US, aviation) Prefix code for NASA research fighter plane designations. / (pathology) Initialism of necrotizing fasciitis. / (pathology) Initialism of neurofibromatosis.