Results may be assigned to a permanent database or printed on the terminal.
All expressions operate on self-describing data structures.
X11 support includes graphics devices for OPEN LOOK and Motif graphical user interfaces. Graphics can be printed on PostScript or LaserJet printers, or HP-GL plotters. The language can be extended easily with user-written functions, and dynamically or statically loaded subroutines in C and Fortran. On-line documentation is available through the help function. An X11-based help system is available through the help.start function.