Before Grapher and Mac OS X, Mac OS 9 was bundled with Graphing Calculator, a similar program to that of Grapher that was bundled with over 20 million Macintosh computers since 1994 with System 7. Originally named Curvus Pro X, it was purchased by Apple from Arizona Software on July 22, 2004. All versions of Mac OS X prior to Mac OS X v10.4 have been missing a bundled graphing calculator application.