QuickTime Virtual Reality is a subset of the functionality of Apple Quicktime[*] for non linear movie files. Like linear movies they have the extension .mov and need QuickTime player installed to be viewed. Very basic QTVR panoramas can also be viewed using PTViewer.
QTVR refers to the ability to display spherical panoramas in Cubic Projection, cylindrical, partial panoramas, multinode panoramas and objects in a viewer where the user can move around or rotate the object using the mouse and keyboard. The panoramas can be linked through hotspots in order to move from one panorama file to the other or link several panoramas in one multinode file.