| Real Tracker Music Module (MOD) Format | |
| National Instruments | |
| Ads |
Files with the .RTM extension contain app menu data and non-standard user elements for use by the LabVIEW software. They are used for displaying functions and available virtual instrument operations. Virtual Instrument must refer to an RTM file for the menu to work correctly.
The LabVIEW software is used for scientific measurements and interacting with devices. It allows for the creation of RTM files during editing run-time menus. Run-time menus work correctly only when a VI is active.
| .aawdef | Ad-Aware Definitions Format |
| .abr | Adobe Photoshop Brush Format |
| .ac$ | AutoCAD Undo Info Format |
| .acc | DR DOS - ViewMax Format |
| .acl | Microsoft Office Automatic Correction List |
| .acs | Microsoft Agent Character Structured Storage Format |
| .ad | After Dark Screen Saver Format |
| .add | Microsoft Dynamics AX Developer Documentation Format |