| .EXEMPLE | Apple | Ficheiros de Dados | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .EXPLOSION | Apple | Ficheiros de Dados | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .EYA | ESRI China (Beijing) | Ficheiros Gráficos | eYaViewer Graphics File | Unknown Software | Unknown Developer |
| .F07 | Unknown Developer | Ficheiros de Fonte | DOS 7-pixel Screen Font | Unknown Software | Unknown Developer |
| .F0A | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .F1C | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .F3 | Unknown Developer | Uncommon Files | FLASH BIOS File | Unknown Software | Unknown Developer |
| .F32 | FMJ-Software | Ficheiros de Áudio | Raw 32-Bit Audio File | Unknown Software | Unknown Developer |
| .F3LA | Corel | Ficheiros Gráficos | Corel Texture File | Unknown Software | Unknown Developer |
| .FAST | Apple | Ficheiros de Dados | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .FC | OpenText | Ficheiros de Configurações | FirstClass Settings File | Unknown Software | Unknown Developer |
| .FCX | Patton & Patton Software | Ficheiros de Imagem 3D | Flow Charting Diagram File | Unknown Software | Unknown Developer |
| .FDCSS | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .FDV | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .FEL | Unknown Developer | Uncommon Files | Uncommon File Extension | Unknown Software | Unknown Developer |
| .FENDER | Apple | Ficheiros de Dados | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .FFR | Unknown Developer | Ficheiros Compactados | FFR Compressed Archive | Unknown Software | Unknown Developer |
| .FILE | Unknown Developer | Uncommon Files | Generic Windows File | Unknown Software | Unknown Developer |
| .FILELOCK | Unknown Developer | Ficheiros Encriptados | FileLock Data | Unknown Software | Unknown Developer |
| .FILES | Apple | Ficheiros de Dados | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .FILTER | Apple | Ficheiros de Dados | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .FIM | Terry W Gintz and Jules Ruis | Ficheiros de Dados | Fractal Imaginator Data Or Parameter | Unknown Software | Unknown Developer |
| .FINAL | Apple | Ficheiros de Dados | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .FIQ | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .FISH | Unknown Developer | Ficheiros de Dados | 3D Fish Tank File | Unknown Software | Unknown Developer |
| .FIX | Corey Zeke Womack (Torrunt) | Ficheiros Gráficos | Vimage Image File | Unknown Software | Unknown Developer |
| .FIXED | Unknown Developer | Uncommon Files | DLLbackup Root File | Unknown Software | Unknown Developer |
| .FJO | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .FLE | Unknown Developer | Ficheiros de Configurações | Scanner Settings File | Unknown Software | Unknown Developer |
| .FLETCH | Apple | Ficheiros de Dados | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .FLEX | Unknown Developer | Ficheiros de Dados | Flexi Data Smoothing File | Unknown Software | Unknown Developer |
| .FMC | Interscape | Ficheiros de Dados | FormConnect Form File | Unknown Software | Unknown Developer |
| .FN_ | Unknown Developer | Ficheiros CAD | CAD File | Unknown Software | Unknown Developer |
| .FONTS | Unknown Developer | Ficheiros de Fonte | Font File | Unknown Software | Unknown Developer |
| .FORMATTER | Apple | Ficheiros de Dados | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .FORUM | Apple | Ficheiros de Dados | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .FR12 | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .FR6 | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .FSE | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .FSF | Microsoft Corporation | Ficheiros Temporários | Microsoft Office Cache Data | Unknown Software | Unknown Developer |
| .FUQ | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .FUZZY | Unknown Developer | Ficheiros de Dados | Fuzzy Logic File | Unknown Software | Unknown Developer |
| .FVP | Unknown Developer | Ficheiros de Configurações | File Viewer Plus Batch Presets File | Unknown Software | Unknown Developer |
| .FVT | Fast Search & Transfer ASA | Ficheiros de Vídeo | FAST Search & Transfer Video File | Unknown Software | Unknown Developer |
| .FWF | Unknown Developer | Ficheiros de Dados | Xwave FWF Data | Unknown Software | Unknown Developer |
| .G1L | Casio Computer Co., Ltd. | Ficheiros de Dados | Casio Model 9860 Data | Unknown Software | Unknown Developer |
| .G1M | Casio Computer Co., Ltd. | Ficheiros de Desenvolvedor | Casio Model 9860 BASIC Program File | Unknown Software | Unknown Developer |
| .G3L | Unknown Developer | Uncommon Files | Uncommon File Extension | Unknown Software | Unknown Developer |
| .G8A | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .GAMDB00P | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .GEOM | Unknown Developer | Uncommon Files | AVS Application Visualization System File | Unknown Software | Unknown Developer |
| .GERMAN | Unknown Developer | Uncommon Files | Unknown Apple II Data File | Unknown Software | Unknown Developer |
| .GHI | Unknown Developer | Ficheiros de Configurações | NCSA Mosaic Configuration File | Unknown Software | Unknown Developer |
| .GIF_ | Unknown Developer | Uncommon Files | GIF Image Filter Databgif File | Unknown Software | Unknown Developer |
| .GKNOTE | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .GL3 | Unknown Developer | Ficheiros de Dados | Green Line File | Unknown Software | Unknown Developer |
| .GLJ | Unknown Developer | Uncommon Files | Uncommon File Extension | Unknown Software | Unknown Developer |
| .GLX | Unknown Developer | Uncommon Files | Uncommon File Extension | Unknown Software | Unknown Developer |
| .GOH | Geoworks Ensemble | Ficheiros de Dados | Geoworks GOC Header File | Unknown Software | Unknown Developer |
| .GON | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .GQ | Unknown Developer | Ficheiros de Dados | QLFC Archive Or Epson Printer Page Description Language | Unknown Software | Unknown Developer |
| .GQA | Hummingbird Ltd. | Ficheiros de Dados | BI/Query Data Model Admin Layer | Unknown Software | Unknown Developer |
| .GR3 | Orchid Technology KK | Ficheiros de Sistema | Graphics Device Driver | Unknown Software | Unknown Developer |
| .GRAPHICS | Apple | Ficheiros de Dados | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .GRIP | World Meteorological Organization | Ficheiros de Dados | Gridded Binary File | Unknown Software | Unknown Developer |
| .GRQ | Barco Graphics | Ficheiros Gráficos | Quickstep Barco Graphics File | Unknown Software | Unknown Developer |
| .GRS | Headlight Software | Ficheiros de Configurações | GetRight Skin | Unknown Software | Unknown Developer |
| .GSFX | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .GSV | Mad Catz | Ficheiros de Jogo | GameShark Saved Game | Unknown Software | Unknown Developer |
| .GSW | Unknown Developer | Ficheiros de Folha de Cálculo | GraphShow Worksheet File | Unknown Software | Unknown Developer |
| .GWQA | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .GX1 | Unknown Developer | Ficheiros Gráficos | Show Partner Graphics File | Unknown Software | Unknown Developer |
| .GYS | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .GZ0 | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .H! | Perfect world Inc. | Ficheiros de Base de Dados | Perfect Database Help Database File | Unknown Software | Unknown Developer |
| .H1 | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .HAI | Unknown Developer | Uncommon Files | Ntgraph Nt09b-2b Emx Lib File | Unknown Software | Unknown Developer |
| .HARP | Apple | Ficheiros de Dados | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .HBQ | Unknown Developer | Uncommon Files | Uncommon File Extension | Unknown Software | Unknown Developer |
| .HEAD | Apple | Ficheiros de Dados | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .HEADER | Apple | Ficheiros de Dados | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .HEC | Unknown Developer | Ficheiros de Dados | Grafic Pvquan Quant File | Unknown Software | Unknown Developer |
| .HED | XnSoft | Ficheiros Gráficos | Hi-Eddi Image File | Unknown Software | Unknown Developer |
| .HELPER | Apple | Ficheiros de Dados | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .HER | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .HEY | Apple | Ficheiros de Dados | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .HFI | Hewlett-Packard | Ficheiros de Fonte | HP Font | Unknown Software | Unknown Developer |
| .HFX | Smith Micro Software | Ficheiros de Dados | HotFax Data File | Unknown Software | Unknown Developer |
| .HIGH | Apple | Ficheiros de Dados | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .HJD | Unknown Developer | Uncommon Files | Uncommon File Extension | Unknown Software | Unknown Developer |
| .HLG | BMERC | Ficheiros de Dados | BMERC Homolog File Format | Unknown Software | Unknown Developer |
| .HLW | Unknown Developer | Ficheiros de Dados | Win32/AMalum.EDHZ Data | Unknown Software | Unknown Developer |
| .HM4 | Lorex Technology | Ficheiros de Cópia de Segurança | Lorex Backup File | Unknown Software | Unknown Developer |
| .HNB | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .HNL | Unknown Developer | Ficheiros de Dados | Hunter MFC Data | Unknown Software | Unknown Developer |
| .HNM | Cryo Interactive Entertainment | Ficheiros de Vídeo | Cryo HNM Movie Soundtrack | Unknown Software | Unknown Developer |
| .HNQ | Unknown Developer | Uncommon Files | Hunter File | Unknown Software | Unknown Developer |
| .HNT | Unknown Developer | Uncommon Files | Hunter CSV Based Collections | Unknown Software | Unknown Developer |
| .HNY | Unknown Developer | Uncommon Files | Unknown File Type | Unknown Software | Unknown Developer |
| .HOF | Unknown Developer | Ficheiros de Jogo | Hall Of Fame Data | Unknown Software | Unknown Developer |
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