| Adobe PageMaker PostScript Printer Description Format | |
| Adobe Systems | |
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PPD files are used for controlling printers using PostScript language. PostScript was designed to help generate text and graphics for printing.
PPD file stores full information needed to manipulate a printer in the process of creating documents (page orientation and layout, font style, resolution, page elements, etc.). PPD stores instructions in PostScript; typically used in laser printing.
Windows
Mac OS
| .adm | Administrator Policy Template Format |
| .adml | Microsoft Administrative Language-specific XML Template Format |
| .admx | Microsoft Administrative XML Template Format |
| .aml | Microsoft Assistance Markup Language |
| .ani | Animated Cursor |
| .ann | Microsoft Windows Help Annotation Format |
| .aos | Archos Signed Encrypted Data Format |
| .asec | Google Android Encrypted Application Package Format |