File:Psiber-tabs.gif

Summary
This is a screen snapshot from "PSIBER: PostScript Interactive Bug Eradication Routines", a visual PostScript programming environment and debugger for the NeWS window system, developed by Don Hopkins. It shows tabbed windows containing PostScript objects, which the user can drag on and off of the PostScript stack and into each other, and explore and manipulate by opening up tree structures and editing outlines.