FSE may refer to:
Organizations edit
- Federation of European Scouting (disambiguation) (French: Fédération du Scoutisme Européen)
- Ferrovie del Sud Est, an Italian railway company
- Football Supporters Europe, a football fan network
- Fung Seng Enterprises, a Hong Kong conglomerate
- Franciscan Sisters of the Eucharist, a Roman Catholic religious congregation
Computing edit
- Fast Software Encryption, cryptography conference
- Finite-state entropy, entropy coding scheme
Finance edit
- Frankfurt Stock Exchange, Germany's largest stock exchange
- Fukuoka Stock Exchange, a stock exchange in Japan
Human and veterinary medicine edit
Science and technology edit
- Fast Spin Echo, a type of magnetic resonance imaging sequence
- Free surface effect, liquids in slack tanks
Other edit
- Finnish Sign Language (fse), the ISO languagecode for the Finnish sign language
- Fremont Street Experience, a pedestrian mall
- Field service engineer