| .ACB | Adobe Systems Incorporated | Asetustiedostot | Adobe Photoshop Color Book File | Adobe Illustrator CC | Adobe Systems Incorporated |
| .AI | Adobe Systems Incorporated | Vektorikuvatiedostot | Adobe Illustrator File | Adobe Illustrator CC | Adobe Systems Incorporated |
| .AI3 | Adobe Systems Incorporated | Graafiset Tiedostot | Generic Encapsulated PostScript Graphic Format File | Adobe Illustrator CC | Adobe Systems Incorporated |
| .AI4 | Adobe Systems Incorporated | Vektorikuvatiedostot | Encapsulated PostScript File | Adobe Illustrator CC | Adobe Systems Incorporated |
| .AIP | Adobe Systems Incorporated | Laajennustiedostot | Illustrator Plug-in | Adobe Illustrator CC | Adobe Systems Incorporated |
| .AIT | Adobe Systems Incorporated | Asetustiedostot | Adobe Illustrator Template | Adobe Illustrator CC | Adobe Systems Incorporated |
| .ART | Autodesk, Inc. | CAD-tiedostot | ArtCAM Model | Adobe Illustrator CC | Adobe Systems Incorporated |
| .ASE | Adobe Systems Incorporated | Asetustiedostot | Adobe Swatch Exchange File | Adobe Illustrator CC | Adobe Systems Incorporated |
| .ASP | Microsoft Corporation | Web-tiedostot | Active Server Page | Adobe Illustrator CC | Adobe Systems Incorporated |
| .AST | Apple | Datatiedostot | ClarisWorks Assistant File | Adobe Illustrator CC | Adobe Systems Incorporated |
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