| .A5W | Alpha Software | Web-tiedostot | Alpha Five Webpage File | Alpha Anywhere - Alpha Software | Alpha Software |
| .ABM | Unknown Developer | Äänitiedostot | Music Album | Alpha Five | Alpha Software |
| .ADB | Open Source | Sovelluskehittäjän tiedostot | Ada Body File | Alpha Anywhere - Alpha Software | Alpha Software |
| .ADBLOCK | Alpha Software | Väliaikaiset Tiedostot | Alpha Five Library Temporary File | Alpha Anywhere - Alpha Software | Alpha Software |
| .AEX | Adobe Systems Incorporated | Laajennustiedostot | After Effects Plug-in | Alpha Anywhere - Alpha Software | Alpha Software |
| .ALB | Alpha Software | Sovelluskehittäjän tiedostot | Alpha Five Library | Alpha Anywhere - Alpha Software | Alpha Software |
| .ALM | Alpha Software | Sovelluskehittäjän tiedostot | Alpha Five Library | Alpha Anywhere - Alpha Software | Alpha Software |
| .ALX | BlackBerry | Asetustiedostot | BlackBerry Application Loader XML File | Alpha Anywhere - Alpha Software | Alpha Software |
| .AS4 | askSam Systems | Varmuuskopiointitiedostot | AskSam Backup File | Alpha Four | Alpha Software |
| .ASI | Borland | Laajennustiedostot | ASsembler Include | Alpha Anywhere - Alpha Software | Alpha Software |
| .ASX | Microsoft Corporation | Videotiedostot | Microsoft ASF Redirector File | Alpha Anywhere - Alpha Software | Alpha Software |
| .AXB | Alpha Software | Sovelluskehittäjän tiedostot | Alpha Five Xbasic Script | Alpha Five | Alpha Software |
| .BMT | Alpha Software | Sovelluskehittäjän tiedostot | Alpha Five Image Library | Alpha Five | Alpha Software |
| .CDX | Microsoft Corporation | Datatiedostot | Compound Index File | Alpha Anywhere - Alpha Software | Alpha Software |
| .DBF | dBase, LLC | Tietokantatiedostot | Database File | Alpha Five | Alpha Software |
| .DDD | Alpha Software | Sovelluskehittäjän tiedostot | Alpha Five Data Dictionary File | Alpha Anywhere - Alpha Software | Alpha Software |
| .DDM | Alpha Software | Sovelluskehittäjän tiedostot | Alpha Five Data Dictionary Memo File | Alpha Anywhere - Alpha Software | Alpha Software |
| .DDX | Alpha Software | Sovelluskehittäjän tiedostot | Alpha Five Data Dictionary Index File | Alpha Anywhere - Alpha Software | Alpha Software |
| .FPT | Sage | Tietokantatiedostot | ACT! Data File | Alpha Five | Alpha Software |
| .MUF | Alpha Software | Datatiedostot | Alpha Five License File | Alpha Anywhere - Alpha Software | Alpha Software |
| .SEM | Alpha Software | Sovelluskehittäjän tiedostot | Alpha Five Set Data Dictionary Memo File | Alpha Anywhere - Alpha Software | Alpha Software |
| .SET | Xerox | Asetustiedostot | Document Library Property Set File | Alpha Five | Alpha Software |
| .SEX | Alpha Software | Sovelluskehittäjän tiedostot | Alpha Five Set Data Dictionary Index File | Alpha Anywhere - Alpha Software | Alpha Software |
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