| Extensible Storage Engine (ESE) Reserve Transaction Log Format | |
| Microsoft | |
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File with a .JRS extension contains registers of transactions that could not be stored on the target storing disc, due to its capacity limitation. JRS files are stored in a queue data base and they are the backup storage space for the transactions storing.
JRS files are created and utilised by message exchange software and the Microsoft Exchange work environment.
| .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 |