| amio | Adobe Audition AMIO Plugin |
| amxx | AMX Mod X Plugin |
| aoi | Microsoft Dynamics AX Application Object Index |
| aol | America Online |
| apd | Lotus 1-2-3 Printer Driver |
| api | Lotus 1-2-3 Printer Driver |
| apl | ACDSee Plugin |
| aplg | Audials One Plug-in |
| apln | Adobe InDesign Plug-in |
| aplp | Audials One Plug-in Package |
| appdownload | AppStore Partially Downloaded App |
| appex | Mac OS X Application Extension |
| appimage | AppImage Image |
| aqq | AQQ Plug-in |
| aria2 | aria2 Control Data |
| artask | BMC Remedy User Tool Shortcut |
| asd | Lotus 1-2-3 Screen Driver |
| asl | Adobe Photoshop Layer Style |
| assistant | HP Printer Utility for Mac Assistant Plugin |
| ast | ASTree Program |
| asv | Adobe Photoshop Selective Color |
| atahd | Puppy Linux ATA Hard Drive Flag |
| atf | Adobe Photoshop Transfer Functions |
| automaticdestinations-ms | Windows Jump List |
| ava | Adobe Photoshop Variations File |
| avastvpn | Avast SecureLine VPN License Data |
| avh | Pioneer AVH Firmware Update |
| awc | Emulex AWC Firmware Update |
| axx | AxCrypt Encrypted File |
| backup | Backup Copy File |
| bai | BUILD2WIN Add-in |
| bak | Backup Copy File |
| bcf | MapTek Vulcan Script |
| bcs | Sonic Foundry Batch Converter Script |
| bdd | BRender Device Driver |
| bea | BEA WebLogic Platform License |
| beb | EEC Analyzer Data |
| bem | Babel Enterprise Module |
| bfe | Bcrypt Encrypted Data |
| bfu | Brute Force Uninstaller Script |
| bi2 | WD TV Live Firmware |
| bin | PCSX BIOS Image |
| TenCORE Plug-in |
| bin2 | Huawei HG556a Software Update |
| bio | General BIOS File |
| bj | Sound Forge Batch Job |
| bk | Backup Copy File |
| bkz | BaKoMa TeX Installation Module |
| bl7 | Ruckus ZoneFlex Firmware Update |
| blg | Windows Binary Performance Log |
| blj | Sagem Fast 3202 Firmware |
| blr | Sagem Fast 3202 Firmware |
| bms | Binary MultiEx Script |
| bnc | Bojanov Encryptor File |
| bnd | DB2 CLI Bind File |
| bpkey | Blender Publisher License Key |
| bpz | Easy Blue Print Symbol Library |
| bra | SAP BRARCHIVE Lock File |
| bri | Bryce Plug-in |
| brm | Bryce Plug-in |
| bro | Bryce Plug-in |
| bsuf | SolarEdge Inverter Firmware |
| bsz | BSPlayer Skin File |
| bs_ | Microsoft Bookshelf Find Menu Shell Extension |
| bt! | BitSpirit Incomplete Download |
| btkey | uTorrent License Key |
| btwsendto | Windows Bluetooth Transfer Options Data |
| buf | Buffer |
| buj | Personal Backup Saved Task |
| bup | DVD Information Backup |
| bvd | Bitdefender Vault File |
| bxt | ETH2DALI Firmware Data |
| bzi | DBAN Kernel Image |
| bzplug | Corel AfterShot Pro Plugin Bundle |
| bzs | BlueZone Script |
| c2a | Casio ClassPad II Add-in |
| c2u | Texas Instruments CBL 2 OS File |
| c32 | Syslinux COM32 Module |
| cache | General Cache File |
| cat | Microsoft Windows Security Catalog |
