Grace is a WYSIWYG 2D plotting tool for X Window System and OSF Motif. Grace runs on practically any version of Unix. A few of features of Grace are: User defined scaling, tick marks, labels, symbols, line styles, colors. Batch mode for unattended plotting. Read and write parameters used during a session. Regressions, splines, running averages, DFT/FFT, cross/auto-correlation, ... Support for dynamic module loading. Hardcopy support for PostScript, PDF, PNM, JPEG, and PNG formats. Device-independent Type1 font rastering.