Accepts data files or stdin in a form similar to the unix program graph and displays line graphs, scatter plots, or bar charts on an X11 display. Fully annotated with title, axis numbering and labels, and legend. Zooming with the mouse is supported. Can generate hardcopy output to Postscript printers and HPGL plotters. Output can be directly pasted into idraw (drawtool) for further annotation. Particularly useful in shell scripts. Also see "ygraph" which is a similar tool using an attractive albeit slower modern graphics library, which is under active maintenance and development.