| Federación Socialista Madrileña | Spanish | FSM |
| flight simulator mode | Government | FSM |
| Flight Schedule Monitor | Transportation | FSM |
| Field Service Manager | Telecom | FSM |
| Factory Service Manual | Business | FSM |
| Fort Smith Rgnl airport | Regional Airport Code | FSM |
| Foodarama Supermarkets, Inc. | AMEX Symbol | FSM |
| Flat Sorting Machine | USPS | FSM |
| Foot Strike Management | Sports | FSM |
| Free Speech Movement | US Government | FSM |
| Foolishly Spent Money | Internet Slang | FSM |
| food service management | Government | FSM |
| Free Software Movement | Computing | FSM |
| Flight Synchronizer Module | NASA | FSM |
| Flying Spaghetti Monster | Funny | FSM |
| Flying Sphagetti Monster | Funny | FSM |
| Fred Savage Mafia | Funny | FSM |
| Fort Smith (ar) | Airport Code | FSM |
| Free School Meals | Education | FSM |
| Federated System Manager | Business Position | FSM |
| flight simulator model | Government | FSM |
| Footstrike Shear Management | Sports | FSM |
| Field Staff Member | Business Position | FSM |
| Flight Simulation Monitor | Transportation | FSM |
| Fold, Spindle, and Mutilate | Computer Assembly | FSM |
| Finite State Machines | Other | FSM |
| Font Scaling Manager | Computing | FSM |
| Fortuna Silver Mines Inc. | NASDAQ Symbol | FSM |
| Flying Scale Models | Hobby | FSM |
| Farandole Composer WaveSample Music format | File Extension | FSM |
| Federated States of Micronesia | Ocean Science | FSM |
| Fiji School of Medicine | University | FSM |
| Fixed String Mode | Computer Assembly Language | FSM |
| Film Score Monthly | Other | FSM |
| Fuel Supply Module | Space Science | FSM |
| Fabryka Samochodów Małolitrażowych | Other | FSM |
| Finite State Machine (H.323 Gatekeeper) | Computer and Networking | FSM |
| Micronesia, Federated States of | Country ISO Code | FSM |
| Firmware Support Manual | Computer Software | FSM |
| fire support module | Government | FSM |
| Finite State Machine | Electronics | FSM |
| Fry Sailor Moon | Funny | FSM |
| Field Service Management | Business Management | FSM |
