.MLS File Extension

Schedule created with Milestones Simplicity, a software program that creates presentation-ready schedules; used for planning projects and managing deadlines; contains custom-designed calendars that may include text, icons, and other images.

Playlist of video files created with CrystalPlayer, an advanced digital video player for Windows; contains references to video files, similar to bookmarks; provides quick access to commonly used files.

NOTE: The MLS playlist format has a known vulnerability in which the file type can be exploited, allowing arbitrary code to be run. Therefore, do not open any unknown MLS files.