This directory contains several device drivers for use with PLPLOT. The files unixdisp.c and amigadisp.c contain the device dispatch tables for UNIX and Amiga machines. (The Amiga screen driver is in the Amiga directory). To add a new driver, you will need to write the appropriate driver code (I suggest you use one of the drivers in this directory to guide you) and then update the dispatch table (either unixdisp.c or amigadisp.c) and then re-make the library.
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.