| FSG | Fab Support Group 
| Others |
| FSG | Fabryka Samochodow Gepard
| Others |
| FSG | Facilitated Study Groups
| Others |
| FSG | Facilitation Services Group
| Others |
| FSG | Facilities Solutions Group
| Others |
| FSG | Facility Services Group
| Others |
| FSG | Facility Solutions Group
| Others |
| FSG | Failure Stupidity and Greed
| Others |
| FSG | Family Support Grant
| Others |
| FSG | Family Support Group
| Others |
| FSG | Farrar Straus and Giroux
| Others |
| FSG | Farrar Straus Giroux
| Others |
| FSG | Fast Small and Good
| Others |
| FSG | Fasting Serum Glucose
| Others |
| FSG | Federal Supply Group
| Others |
| FSG | Federal Surveillance Group
| Others |
| FSG | Feline Stalker Games
| Others |
| FSG | Fellow, Society of Genealogists
| Others |
| FSG | Fenway Sports Group
| Others |
| FSG | Field Support Group
| Others |
| FSG | Filtration Services Group
| Others |
| FSG | Finance Scholars Group
| Others |
| FSG | Financial Services Group
| Others |
| FSG | Financial Standards Group
| Others |
| FSG | Financial Statement Generator
| Others |
| FSG | Finite State Grammar
| Others |
| FSG | First Storage Group
| Others |
| FSG | Fish Stewarding Group
| Others |
| FSG | Flamingo Specialist Group
| Others |
| FSG | Fleet Solutions Group
| Military |
| FSG | Flensburger Schiffbau Gesellschaft
| Others |
| FSG | Florida Society of Goldsmiths
| Others |
| FSG | Florida Sun Grown
| Others |
| FSG | Fluorinated Silica Glass
| Others |
| FSG | Fluorinated Silicate Glass
| Others |
| FSG | Focal Segmental Glomerulonephritis
| Others |
| FSG | Food Security Group
| Others |
| FSG | Food Seed and Grain
| Others |
| FSG | Food, Seed, and Grain
| Others |
| FSG | Fooking Stupid Guys
| Others |
| FSG | Force Strategy Group
| Others |
| FSG | Force Support Group
| Others |
| FSG | Forest Solutions Group
| Others |
| FSG | Format Standard Generalized Markup Language
| Others |
| FSG | Formula Student Germany
| Others |
| FSG | Foundation Strategy Group
| Others |
| FSG | Free Spirit Gathering
| Others |
| FSG | Free Standards Group
| Others |
| FSG | Front Splash Guards
| Others |
| FSG | Frontier Services Group
| Others |
| FSG | Frontier Strategy Group
| Others |
| FSG | Fukushima School Group
| Others |
| FSG | Fukushima Souhatsu Giken
| Others |
| FSG | Full Service Gross
| Others |
| FSG | Funny Star Gaming
| Others |
| FSG | Fuso Super Great
| Others |
| FSG | Future Stars Gaming
| Others |