CUR is a file - the image of the cursor, sometimes animated, which is used for the mouse pointer in Windows. This may be an arrow (for general use), rotating hourglass (wait), or the symbol I (editing). Users can change or edit the standard cursors. To view and edit files .CUR suitable programs such as Inkscape, Corel VideoStudio.
This is a vector images format created in a program for SK1 drawings, which was developed under Linux for open distribution. It contains vector graphics and is used for storing maps, brochures, logos and other illustrations. Today it’s used in vector graphics editors such as Sketch and Skencil.