File extension Details of MAM, MSI, MCI, MSO, MSO, MRK, MSU, MAQ, MDW

Name:	MAM
File Type:	Microsoft Access Macro
Popularity:	3
Category:	misc
File Description:	Macro that can execute one or more commands in Microsoft Access
Open Programs:	Windows Microsoft Access

Name:	MSI
File Type:	Windows Installer Package
Popularity:	5
Category:	misc
File Description:	Contains installation information for a particular installer, such as files to be installed and installation locations; may be used for Windows updates as well as third-party software installers. The contents of an MSI package may be extracted using a file decompression utility like 7-Zip. NOTE: In Windows Vista, .MSU files are used to install system updates and hotfixes.
Open Programs:	Windows Microsoft Windows Installer 7-Zip

Name:	MCI
File Type:	Media Control Interface
Popularity:	3
Category:	misc
File Description:	Driver introduced with Windows 3.1 that supports multiple audio/video formats; acts as an layer between the media and the media player
Open Programs:	Windows Mimic SJGPlay VB-Amp Pro WinCDG WinCron

Name:	MSO
File Type:	Inline E-mail Attachment   (Most common)
Popularity:	3
Category:	misc
File Description:	File sent with Microsoft Word 2000 e-mail attachments; often named "Oledata.mso;" contains information that allows the attachment to be rendered within the e-mail message. The Oledata.mso file will appear as a separate attachment on computers that do not have Microsoft Outlook 2000 or later installed.
Open Programs:	Mac OS Microsoft Entourage Windows Microsoft Outlook 2000 or later

Name:	MSO
File Type:	Microsoft Office Macro Reference File
Popularity:	3
Category:	misc
File Description:	File created when saving a Microsoft Office document as a Web page; contains information about macros and OLE (Object Linking and Embedding) objects included in the original file; may be referenced by the created Web page as a style sheet. May be viewed with a text editor, but will be unreadable since the contents are encoded.
Open Programs:	Mac OS Should not be opened manually Windows Should not be opened manually

Name:	MRK
File Type:	DPOF Auto Print Order File
Popularity:	3
Category:	misc
File Description:	Text file saved on digital cameras along with the digital images; describes the order the pictures should be printed in when printing pictures directly from the camera; used by digital photo printing services that support the Digital Print Order Format (DPOF). The Print Order file is usually saved in the /MISC folder on digital camera media and is named "AUTPRINT.MRK."
Open Programs:	Mac OS Referenced by various digital photo printers View with a text editor Windows Referenced by various digital photo printers View with a text editor

Name:	MSU
File Type:	Windows Vista Update Package
Popularity:	3
Category:	misc
File Description:	Update file used by Windows Update for updating programs and files in Windows Vista and Windows Server 2008; installed by the Windows Update Stand-alone Installer, which is run by Windows Update. Each MSU file contains four elements: Windows Update metadata that describes each update package One or more .CAB files that contain the update data An .XML file that describes the contents of the MSU file A properties file read by Wusa.exe NOTE: Previous versions of the Windows operating system used .MSI files for Windows updates.
Open Programs:	Windows Microsoft Windows Update Stand-alone Installer (Wusa.exe)

Name:	MAQ
File Type:	Microsoft Access Query
Popularity:	3
Category:	misc
File Description:	SQL query used by a Microsoft Access database
Open Programs:	Windows Microsoft Access

Name:	MDW
File Type:	Access Workgroup File
Popularity:	3
Category:	misc
File Description:	Stores usernames and passwords of users allowed to open a specific Access database; must be linked to an Access database to be effective
Open Programs:	Windows Microsoft Access

Name:	MS-TNEF
File Type:	MS Transport Neutral Encapsulation Format
Popularity:	3
Category:	misc
File Description:	Contains rich text formatting used in Microsoft Exchange e-mail messages (bold, italics, underlining, etc.); does not contain actual message text; application/ms-tnef may appear if your e-mail client does not support MS Exchange formatting
Open Programs:	Mac OS Mac OS X Mail Microsoft Entourage Windows Microsoft Outlook or Outlook Express