FSN

FSN may refer to:

• Fate/stay night, a visual novel and its adaptations.
• The Federal Stock Number, a numeric code used to identify items in the Joint Army-Navy Catalog System.
• The Federation of Student Nationalists: the student wing of the Scottish National Party.
• Filter Smoke Number
• Five-SeveN, a semi-automatic pistol designed and manufactured by FN Herstal in Belgium.
• Forest Star Networks, a Telecom Operator Enabler within the VoIP and Fixed & Mobile VNO and Metro Networks segment.
• Fox Sports Networks, a national network of regional sports channels in the United States
• Fox Sports News, an Australian cable and satellite sports news channel.
• Full Service Network, a Pittsburgh-based competitive local exchange carrier
• Full Service Network, a defunct digital video broadcasting service
• FSN Broadband, an Internet and Broadband Phone Service Provider
• Global Forum on Food Security and Nutrition
• Fronte Sociale Nazionale (National Social Front), an Italian far right political party
• Frontul Salvării Naţionale (National Salvation Front), a former revolutionary group and governing political party of Romania
• Fsn, a 3-D file manager that appeared in the movie Jurassic Park
• Feature Story News, international broadcast news agency
• Federal State of Novorossiya, a separatist entity in eastern Ukraine and participant in the War in Donbass
• Fu's subcutaneous needle, an innovation for the treatment of myofascial pain and trigger points