| .ACB | Adobe Systems Incorporated | File di settaggi | Adobe Photoshop Color Book File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .ACF | Valve | File di giochi | Steam Application Cache File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .ACO | Adobe Systems Incorporated | File di settaggi | Adobe Photoshop Color Swatch File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .ACV | Adobe Systems Incorporated | File di settaggi | Photoshop Curves File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .ADO | Adobe Systems Incorporated | File di settaggi | Adobe Photoshop Duotone Options File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .AFX | Auto FX Software | File con immagini raster | Auto FX PhotoGraphic Edges Image | Adobe Photoshop CC | Adobe Systems Incorporated |
| .AHS | Adobe Systems Incorporated | File di settaggi | Adobe Halftone Screen File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .AHU | Adobe Systems Incorporated | File di settaggi | Adobe Photoshop HSL File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .AI | Adobe Systems Incorporated | File con immagini vettoriali | Adobe Illustrator File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .AI3 | Adobe Systems Incorporated | File grafici | Generic Encapsulated PostScript Graphic Format File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .ALV | Adobe Systems Incorporated | File di settaggi | Adobe Photoshop Levels File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .AMP | Adobe Systems Incorporated | File di settaggi | Adobe Photoshop Curves Map File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .AMS | Adobe Systems Incorporated | File di settaggi | Adobe Monitor Setup File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .API | Adobe Systems Incorporated | File di settaggi | Adobe Photoshop Inks File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .ARW | Sony | File Videocamera non elaborati | Sony Digital Camera Image | Adobe Photoshop CC | Adobe Systems Incorporated |
| .ASP | Microsoft Corporation | File web | Active Server Page | Adobe Photoshop CC | Adobe Systems Incorporated |
| .ASR | Adobe Systems Incorporated | File web | ActionScript Remote Document | Adobe Photoshop CC | Adobe Systems Incorporated |
| .AST | Apple | File di dati | ClarisWorks Assistant File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .ASV | MakeMusic, Inc. | File backup | Finale Auto-save File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .ATF | Molecular Devices | File di dati | Axon Text File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .ATN | Adobe Systems Incorporated | File di settaggi | Photoshop Actions File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .AXT | Adobe Systems Incorporated | File di settaggi | Adobe Photoshop Extract File | Adobe Photoshop CC | Adobe Systems Incorporated |
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