FILExt - The File Extension Source

Details for file extension .MSO are on this page. Because there is no central registry for file extensions and their associated programs there may be multiple entries on this page. And, because there are many (some say over a million) such associations not all may be listed here.

TIP: Click here to run a FREE scan for .MSO related errors.

Windows can't open .MSO files?
If Windows is unable to open files with the extension .MSO you may not have the appropriate program installed or, you may have registry errors. To help, we strongly recommend you run this free registry scan.

A search on the file extension you submitted shows 6 record(s). The details for each of these are shown below. The best FILExt can do for you is provide the details we know about. Selecting the information that applies to your particular situation is up to you. Use any hints provided. If the information here is not helpful, FILExt is sorry; but as a research site FILExt cannot provide personal support. If you need further information you might try the research tips on the FILExt Help Me page.

Extension: MSO
Program and/or Extension Function [What's This?]		Company [What's This?]
Word OLE Web Page Storage Stream		Microsoft Corporation
Specific Notes [What's This?]
Office Word is an authoring program that gives you the ability to create and share documents using a set of writing tools. When sending HTML messages with an attached Microsoft Office 2000 document, the message is sent as an Outlook HTML message, not an Office Envelope message. The Oledata.mso file contains necessary information to properly render the attachment in the message in its originating program. This is known as "round tripping." There is no useful information for the user in this file and it is not editable. Do not delete this file; doing so could render the attached file unuseable. On computers without Outlook 2000 installed, you will see the Oledata.mso file as an additional attachment. Recommended: Find MSO errors now.
MIME Type [What's This?]	File Classification [What's This?]	Associated Links [What's This?]
		None
Identifying Characters [What's This?]
(None or Unknown)
Program ID [What's This?]
(None or Unknown)
General Notes [What's This?]
(None)
This is record 7695 last modified on 2006-01-05 and created on 2003-01-14.

Extension: MSO
Program and/or Extension Function [What's This?]		Company [What's This?]
ActiveMime Object
Specific Notes [What's This?]
(None) Recommended: Find MSO errors now.
MIME Type [What's This?]	File Classification [What's This?]	Associated Links [What's This?]
		None
Identifying Characters [What's This?]
Hex: 41 63 74 69 76 65 4D 69 6D 65 ASCII: ActiveMime
Program ID [What's This?]
(None or Unknown)
General Notes [What's This?]
(None)
This is record 24252 last modified on 2007-09-03 and created on 2007-09-03.

Extension: MSO
Program and/or Extension Function [What's This?]		Company [What's This?]
FrontPage File		Microsoft Corporation
Specific Notes [What's This?]
(None) Recommended: Find MSO errors now.
MIME Type [What's This?]	File Classification [What's This?]	Associated Links [What's This?]
		None
Identifying Characters [What's This?]
(None or Unknown)
Program ID [What's This?]
(None or Unknown)
General Notes [What's This?]
(None)
This is record 7692 last modified on 2004-06-01 and created on 2003-01-14.

Extension: MSO
Program and/or Extension Function [What's This?]		Company [What's This?]
Math Script Object File
Specific Notes [What's This?]
Note: This file type can become infected and should be carefully scanned if someone sends you a file with this extension. Recommended: Find MSO errors now.
MIME Type [What's This?]	File Classification [What's This?]	Associated Links [What's This?]
		None
Identifying Characters [What's This?]
(None or Unknown)
Program ID [What's This?]
(None or Unknown)
General Notes [What's This?]
(None)
This is record 7693 last modified on 2004-09-29 and created on 2003-01-14.

Extension: MSO
Program and/or Extension Function [What's This?]		Company [What's This?]
MedlySound Sound/Module
Specific Notes [What's This?]
Audio routine and editor created by Paul van der Valk. Recommended: Find MSO errors now.
MIME Type [What's This?]	File Classification [What's This?]	Associated Links [What's This?]
	Audio	None
Identifying Characters [What's This?]
Hex: 4D 53 4F 42 00 ASCII: MSOB
Program ID [What's This?]
(None or Unknown)
General Notes [What's This?]
(None)
This is record 17393 last modified on 2004-09-14 and created on 2004-09-14.

Extension: MSO
Program and/or Extension Function [What's This?]		Company [What's This?]
Orgchart File		Microsoft Corporation
Specific Notes [What's This?]
(None) Recommended: Find MSO errors now.
MIME Type [What's This?]	File Classification [What's This?]	Associated Links [What's This?]
		None
Identifying Characters [What's This?]
(None or Unknown)
Program ID [What's This?]
(None or Unknown)
General Notes [What's This?]
Note: This entry has not yet been verified by FILExt. It was submitted to the list and appeared to be accurate; however, no verification links have so far been found on the Internet. Please use this association data with that in mind.
This is record 7694 last modified on 2003-01-14 and created on 2003-01-14.

General Info

• If the extension you are looking for is of the form .??_ the file is likely a compressed file and part of an install routine. When the install program runs it will expand the file and replace the underscore with the proper letter for the file type.
• If the file is sent as an audio file with any three-character extension it may be a dictation file where the extension is the dictator's initials; playable by BCB Voice Systems software (see ??? extension). The file could likewise be a dictation file in TrueSpeech format. Use Windows Sound Recorder and/or Media Player to play these back.
• If the extension you are looking for has a number at the end or is only a number and there were no results consider entering the same extension format using zero or one as some programs produce numbered split files but when the split can be extensive (e.g., .000-.999) only the first entry is in the database.

Need more information about any entries on this page? Try a Google search using terms in the above information along with words like "format," "convert," "conversion," and even "hacking." A search box is provided here for your convenience.

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