Bookmark file created by PowerDVD, an advanced video player for HD and 3D movies; contains a bookmark, called a MovieMark, for a video, including a timestamp, video information, and user comments.
Files with the BMK extension are Bookmark Help files used in the Microsoft Windows Help menu. The BMK files contain help information that can be used for bookmark related concerns and may be accessed from the Windows Help file. BMK files may be opened and edited with the appropriate software.
Bookmark shortcut stored on Nokia mobile phones; contains a URL and a reference to an icon, which is displayed for the bookmark; used for storing website or file shortcuts; can be viewed with a text editor, although some information may be obscured.