A wealth of source code including: The Berkeley Net/2 tape, MACH, GNU software, InterViews, X11R5 (base MIT distribution, fixes 1-26 and contributed software), Andrew windowing and XFree86, ports of GNU EMACS for DOS (DEMACS and WINEMACS), djgpp (DOS port of GNU GCC C/C++), Modula-3, Windows NT(tm) software and more. ISO- 9660 with Rock Ridge extensions.