FMN
FMN is an abbreviation for:
- Department of Mechanical Engineering North in Rendsburg
- Fédération Motocyclisme National , holder of national sports sovereignty in motorcycle sport, see Fédération Internationale de Motocyclisme
- Flavin mononucleotide , a coenzyme, used as a food additive
- Four Corners Regional Airport , near Farmington, New Mexico, United States (IATA code)
- Fernmeldewerk Nordhausen in the combine communications electronics (former telephone manufacturer)
- Federated Mission Networking , a NATO initiative to prepare the IT of partner nations for coalition missions