| Microsoft Organization Chart Chart Format | |
| Microsoft | |
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Files with the .MSO contain information that allows for the viewing of e-mail message attachments, and are unique to Microsoft Word 2000 attachments. They are supported by the MS Outlook software, versions 2000 and newer.
The file name is usually called Oledata.mso – in cases, where the e-mail client does not support the format, it can sometimes show up as a separate attachments.
Windows
Mac OS
| .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 |
