| .9B | Unknown Developer | Sonstige Dateien | Unknown Apple II Data File | Unknown Software | Unknown Developer |
| .9DEE5 | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .9T | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .A-0 | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .A021 | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .A1J | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .A2 | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .A3 | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .A349 | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .A4J | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .A68 | Digital Equipment Corporation | Entwicklerdateien | PDP-10 Algol-68 Compiler Source | Unknown Software | Unknown Developer |
| .A8 | Cubicomp | Rasterbilddateien | Cubicomp PictureMaker 3D Animation Data | Unknown Software | Unknown Developer |
| .AA48 | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .ABB | Unknown Developer | Textdateien | AlphaBB Data | Unknown Software | Unknown Developer |
| .AC7 | National Instruments | Textdateien | SPICE AC/Frequency Domain Output File | Unknown Software | Unknown Developer |
| .ACT | Bell Labs | Audiodateien | ADPCM Compressed Audio File | Unknown Software | Unknown Developer |
| .ACTBIN | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .ACUTC | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .ADRESSES | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .AFAE | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .AFX FILE EXTENSION | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .AHF | Anadigm | Textdateien | AnadigmDesigner ASCII Code | Unknown Software | Unknown Developer |
| .AHQ | Unknown Developer | Plugindateien | AudioHQ Plug-in Module | Unknown Software | Unknown Developer |
| .AHR0CDOVL2 | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .AJ0 | Unknown Developer | Sonstige Dateien | Uncommon File Extension | Unknown Software | Unknown Developer |
| .AJO | Unknown Developer | Sonstige Dateien | Uncommon File Extension | Unknown Software | Unknown Developer |
| .AK | Unknown Developer | Komprimierte Dateien | Audio Utility Tuningwrench Compressed File | Unknown Software | Unknown Developer |
| .ALBM | Hewlett-Packard | Rasterbilddateien | HP Photo Printing Software Album File | Unknown Software | Unknown Developer |
| .ALDRIN | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .APG | Unknown Developer | Grafikdateien | Ivana Animated GIF File | Unknown Software | Unknown Developer |
| .APN | Alpine Electronics | 3D-Dateien | Alpine Wallpaper | Unknown Software | Unknown Developer |
| .APPS | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .ARCH | Unknown Developer | Textdateien | Illum Source Dotfiles File | Unknown Software | Unknown Developer |
| .ARMOURFONT | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .ASXP | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .AT | Unknown Developer | Sonstige Dateien | Rescue Disk File | Unknown Software | Unknown Developer |
| .ATOS | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .ATW | Unknown Developer | Textdateien | Attityd Survey Program Data | Unknown Software | Unknown Developer |
| .AUDIO | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .AW_ | Unknown Developer | Komprimierte Dateien | Midiprg Quartz Sets Compressed File | Unknown Software | Unknown Developer |
| .AYA | Unknown Developer | Sonstige Dateien | Uncommon File Extension | Unknown Software | Unknown Developer |
| .AYE | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .AZX | Unknown Developer | Audiodateien | ZX Audio File Format | Unknown Software | Unknown Developer |
| .A_T | Unknown Developer | Textdateien | Atrain File | Unknown Software | Unknown Developer |
| .B1N | Unknown Developer | Sonstige Dateien | Binary Screen Image File | Unknown Software | Unknown Developer |
| .B2Z | Unknown Developer | Textdateien | B2Z dVS Model/Object | Unknown Software | Unknown Developer |
| .B5B5 | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .B7S | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .BAI | B2W Software | Plugindateien | BUILD2WIN Add-in | Unknown Software | Unknown Developer |
| .BAI2 | Bank Administration Institute (BAI) | Textdateien | Cash Management Balance Reporting Specifications Version 2 | Unknown Software | Unknown Developer |
| .BALL | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .BANNER | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .BAO | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .BATH | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .BBZ | BitBlaze | Audiodateien | Bitblaze Audio File | Unknown Software | Unknown Developer |
| .BCS | The Wavelength | Einstellungsdateien | Batch Compiler Specification File | Unknown Software | Unknown Developer |
| .BDCFG | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .BDIFF BUPDATE BINARY UPDATE | Unknown Developer | Textdateien | Bdiff Bupdate Binary Update | Unknown Software | Unknown Developer |
| .BDMB | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .BDSM | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .BDU | Unknown Developer | Sonstige Dateien | Uncommon File Extension | Unknown Software | Unknown Developer |
| .BDZ | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .BEACON | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .BEAT | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .BEATWAVE | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .BER | Unknown Developer | Sonstige Dateien | German Bericht Report File | Unknown Software | Unknown Developer |
| .BF4 | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .BFAB | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .BFCE | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .BFH | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .BFN | Brother International Corporation | Fontdateien | Brother Embroidery Software Font | Unknown Software | Unknown Developer |
| .BHB | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .BIG | Electronic Arts | Spieldateien | Electronic Arts Game Data File | Unknown Software | Unknown Developer |
| .BILL | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .BIN | Unknown Developer | Diskimagedateien | Binary Disk Image File | Unknown Software | Unknown Developer |
| .BJD | NDDigital | Textdateien | NDDigital Print Bureau File | Unknown Software | Unknown Developer |
| .BKG | Samsung Electronics | Textdateien | Samsung Document | Unknown Software | Unknown Developer |
| .BKH | Unknown Developer | Sonstige Dateien | Uncommon File Extension | Unknown Software | Unknown Developer |
| .BKL | KeyCarbon | Textdateien | KeyCarbon Binary Keystroke Log | Unknown Software | Unknown Developer |
| .BKT | Zortech | Sonstige Dateien | Zortech Data File | Unknown Software | Unknown Developer |
| .BLACK | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .BLI | Thomson Reuters Corporation | Sonstige Dateien | Thomson Speedtouch Firmware File | Unknown Software | Unknown Developer |
| .BLOCK | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .BLOSSOMS | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .BLURB | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .BM_ | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .BNN | Unknown Developer | Grafikdateien | Vectorial Image File | Unknown Software | Unknown Developer |
| .BN_ | Unknown Developer | Sonstige Dateien | Ntgraph Ze32v215 File | Unknown Software | Unknown Developer |
| .BOA | Unknown Developer | Komprimierte Dateien | BOA Constrictor Compressed Archive | Unknown Software | Unknown Developer |
| .BONGO | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .BOR | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .BP | Data Access Worldwide | Entwicklerdateien | DataFlex Business Process Object | Unknown Software | Unknown Developer |
| .BPG | Open Source | Rasterbilddateien | Better Portable Graphics (BPG) Image | Unknown Software | Unknown Developer |
| .BPU | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .BRHQUJL | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
| .BRUSH | Xerox | Rasterbilddateien | Xerox Doodle Brush Bitmap Image | Unknown Software | Unknown Developer |
| .BTX | SmartWare Corporation | Backupdateien | SmartWare Backup Text File | Unknown Software | Unknown Developer |
| .BUF | Unknown Developer | Temporäre Dateien | Buffer File | Unknown Software | Unknown Developer |
| .BUSH | Apple | Textdateien | Golden Orchard Apple II CD Rom File | Unknown Software | Unknown Developer |
| .BUTTHEREIS | Unknown Developer | Sonstige Dateien | Unknown File Type | Unknown Software | Unknown Developer |
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