| Acronym | Definition |
|---|
| FSE | Fonds Social Européen |
| FSE | Fondo Sociale Europeo (Italy) |
| FSE | Fast Software Encryption |
| FSE | Field Service Engineer(Ing) |
| FSE | Foyer Socio-Éducatif (French: Socio-Educational Household) |
| FSE | Frankfurt Stock Exchange (Germany) |
| FSE | Foundations of Software Engineering |
| FSE | Field Sales Engineer (Intel) |
| FSE | Feline Spongiform Encephalopathy |
| FSE | Forefront Security for Exchange Server (Microsoft) |
| FSE | Field Support Engineer |
| FSE | Full Screen Editor |
| FSE | File System Extender |
| FSE | Face Sensing Engine |
| FSE | Fetal Scalp Electrode |
| FSE | Fast-Spin Echo |
| FSE | Financial Services Exchange (various locations) |
| FSE | Faculty of Science & Engineering (various universities) |
| FSE | Fire Safety Engineering |
| FSE | Fire Support Element |
| FSE | Feuilles de Soins Électroniques (French: Electronic Care Sheets; healthcare) |
| FSE | Federation Syndicale Etudiante (French: Student Union Federation) |
| FSE | Full Scale Exercise |
| FSE | Field Systems Engineer (various companies) |
| FSE | Fremont Street Experience (Las Vegas) |
| FSE | Face Sensing Engine (software) |
| FSE | Food Service Equipment |
| FSE | Folsom Street East (New York, NY) |
| FSE | Field Support Equipment |
| FSE | From Somewhere Else |
| FSE | Field Software Engineer (various locations) |
| FSE | Flight Support Equipment |
| FSE | Flight Simulation Engineer (US NASA) |
| FSE | Fujitsu Systems Europe |
| FSE | Field Service Evaluation |
| FSE | Fédération du Scoutisme Européen |
| FSE | File System Extender (software) |
| FSE | File System Emulation |
| FSE | Fornecimentos E Serviços Externos (Portuguese: Supplies and External Services) |
| FSE | Federation of Screenwriters in Europe |
| FSE | Fukuoka Stock Exchange |
| FSE | Florida Schools of Excellence |
| FSE | Fractionally Spaced Equalizers |
| FSE | Field Sanitation Equipment (US DoD) |
| FSE | Full Service Equivalent (various organizations) |
| FSE | Fuji Seal Europe |
| FSE | Flying Station Engineer |
| FSE | Fourth Shift Edition (software) |
| FSE | Flying Scheduling Effectiveness (avionics; US Air Force) |
| FSE | Focal Symmetrical Encephalomalacia (sheep enterotoxemia) |
| FSE | Four Stroke Engine |
| FSE | Forward Security Element |
| FSE | Factory Support Equipment |
| FSE | Fundación Shakespeare de España (Spain) |
| FSE | Foreign Service Employee |
| FSE | Flight Systems Engineering |
| FSE | Facility Systems Engineer |
| FSE | Fleet Supportability Evaluation |
| FSE | Finite State Encoder |
| FSE | Facility/Fire Support Element |
| FSE | Functional Support Element |
| FSE | Funso Social Europeu (Portugal) |
| FSE | Fixed, Scientific, Engineering (calculator function) |
| FSE | Follow Ship Evaluation |
| FSE | Febrile Seizure Epilepticus |