| Term | Full Form | Category |
|---|---|---|
| EFRR | Effingham Railroad | Others |
| EFRR | Effingham Railroad Company | Others |
| EFRR | Egyptian Foundation for Refugee Rights | Others |
| EFRR | European Forum for Research in Rehabilitation | Others |
| EFRR | Europejski Fundusz Rozwoju Regionalnego | Others |
| EFRR | Europejskiego Funduszu Rozwoju Regionalnego | Others |