| EFIS | ECO Frequency Information System 
| Others |
| EFIS | Efiselectronic Flight Instrument System
| Others |
| EFIS | Electronic Filing And Information System
| Others |
| EFIS | Electronic Financial Information Service
| Others |
| EFIS | Electronic Flight Information System
| Others |
| EFIS | Electronic Flight Information Systems
| Others |
| EFIS | Electronic Flight Informaton System
| Others |
| EFIS | Electronic Flight Instrument System
| Others |
| EFIS | Electronic Flight Instrument Systems
| Others |
| EFIS | Electronic Flight Instruments System
| Others |
| EFIS | Electronic Fuel Injection Simulator
| Others |
| EFIS | Electronic Fuel Injection System
| Others |
| EFIS | Ero Frequency Information System
| Others |
| EFIS | Esa Financial And Invoicing System
| Others |
| EFIS | European Federation of Immunological Societies
| Others |
| EFIS | European Forest Information System
| Others |
| EFIS | European Future Innovation System
| Others |
| EFIS | Expanded Foam Insulating System
| Others |
| EFIS | Exterior Finish Insulation System
| Others |
| EFIS | Exterior Finishing insulation system
| Others |