CNF may refer to: Cloud-Native Network Function, emerging technology in cloud computing Belo Horizonte International Airport, Brazil, IATA code CNF Chomsky normal form, in formal language theory, first described by Noam Chomsky Configuration file, in computing, typically with file extension .cnf, .conf, .cfg, .cf, or .ini Conjunctive normal form, also known as clausal normal form, in Boolean logic Constant weight without fins, a freediving discipline in which usage of fins or change of ballast is prohibited Organizations Caucasus Nature Fund, a German non-profit supporting protected areas in Transcaucasia Club Nacional de Football, Uruguayan football team Comité National Français, a provisional government of Free France led by Charles de Gaulle Cornell NanoScale Science and Technology Facility, at Cornell University, member of the National Nanotechnology Coordinated Infrastructure Science Carbon nanofiber, cylindrical nanostructures with graphene layers Cellulose nanofibre, a type of nanocellulose Cytotoxic necrotising factor family, members of which are referred to as CNF followed by a number Cyanogen fluoride, a cyanide compound with the chemical formula CNF