Different machine, different window manager, same OS: twm on a SparcStation
10 running sparc 1.4.1, with some C++ source being worked on, gdb,
graphics/gnuplot for checking a different program, and an xdvi
(part of the print/teTeX package) in the background
with a paper the desktop's owner's working on.
Image contributed by Ethan Bakshy <email@example.com>