- NIRVE written in standard C.

- Invokes OpenGL for graphic output.

- Invokes Xlib for graphic input (mouse, spaceball, keyboard).

- Uses a few Unix system calls (system, getenv).

- Launches Tcl/Tk process.

- Both processes are essentially event handling loops. They exchange information via generated X events.

- Uses Netscape for text display (individual documents and generated summaries).

- Running on SGI and Sun; no known platform dependencies.