Unix v5      Windows 8.1
                                                       -------      -----------


Source code for kernel and userland                    YES          NO
Source code for all device drivers                     YES          NO
Source code for c library                              YES          NO
Source code for boot sector                            YES          NO
Source code for boot rom                               YES          NO
comes with assembler & c compiler                      YES          NO
Source code for c compiler                             YES          NO
runs in 256K of memory or less                         YES          NO
entire system fits in 2.5 megs hard drive              YES          NO
All engineering diagrams available for computer
  hardware are available                               YES          NO
Snobol III interpreter                                 YES          NO
Fortran Compiler                                       YES          NO
cost for license                                       FREE         ABOUT 100 Euros