Grace is a WYSIWYG tool to make two-dimensional plots of numerical data. It runs under various (if not all) flavors of Unix with X11 and M*tif (LessTif or Motif). It also runs under VMS, OS/2, and Windows (95/98/NT/2000/XP). Its capabilities are roughly similar to GUI-based programs like Sigmaplot or Microcal Origin plus script-based tools like Gnuplot or Genplot. Its strength lies in the fact that it combines the convenience of a graphical user interface with the power of a scripting language which enables it to do sophisticated calculations or perform automated tasks. Grace is derived from Xmgr (a.k.a. ACE/gr), originally written by Paul Turner. From version number 4.00, the development was taken over by a team of volunteers under the coordination of Evgeny Stambulchik. You can get the newest information about Grace and download the latest version at the Grace home page. When its copyright was changed to GPL, the name was changed to Grace, which stands for “GRaphing, Advanced Computation and Exploration of data” or “Grace Revamps ACE/gr”. The first version of Grace available is named 5.0.0, while the last public version of Xmgr has the version number 4.1.2. Paul still maintains and develops a non-public version of Xmgr for internal use.