| FSSP | Facility Security and Safety Plan 
| Others |
| FSSP | Families of Structurally Similar Proteins
| Others |
| FSSP | Family Of Structurally Similar Proteins
| Others |
| FSSP | Family Support Services Program
| Others |
| FSSP | Federal Shared Service Provider
| Others |
| FSSP | Field Support Services Project
| Others |
| FSSP | Firing Squad Synchronization Problem
| Others |
| FSSP | Fisheries Sector Strategic Plan
| Others |
| FSSP | Florida Schools Safety Portal
| Others |
| FSSP | Florida Society of Sleep Professionals
| Others |
| FSSP | Food Spoilage and Safety Predictor
| Others |
| FSSP | Forward Scattering Spectrometer Probe
| Others |
| FSSP | Forward-scattering Spectrometer Probe
| Others |
| FSSP | Frances Slocum State Park
| Others |
| FSSP | Fraternitas Sacerdotalis Sancti Petri
| Others |
| FSSP | Fraternitas Sacerdotalis Sancti Petri (Priestly Fraternity of St. Peter)
| Others |
| FSSP | Freshman Summer Start Program
| Others |
| FSSP | Fuel System Supply Point
| Others |