| Meaning | Category |
| Federación Independiente de Sindicatos Agrarios | International->Spanish |
| Federated Irish Scouting Association | Community->Scouting |
| Fitness Industry Suppliers Association | Business->Professional Organizations |
| Flinders International Students Association | Academic & Science->Universities |
| Food Industry Sanitation Auditor | Business->Positions |
| Foreign Intelligence Security Act | Community->Sports |
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