Multiple-image Network Graphics (MNG) (pronounced ) is a public
graphics file format for
animated images.MNG is closely related to the
PNG image format. When PNG development started in early 1995, developers decided not to incorporate support for
animation, not least of all because this feature of
GIF was seldom used at the time. However, work soon started on MNG as an animation-supporting version of PNG. Version 1.0 of the MNG specification was released on
January 31 2001.
See more at Wikipedia.org...