Linux vs FreeBSD vs NetBSD vs OpenBSD vs Hurd
Debian vs Slackware vs RedHat
Monolithic kernel vs microkernel
Microsoft Windows NT vs Unix
Java vs LISP vs Scheme vs C
vs C++
Perl vs TCL vs Python vs AWK vs Ksh
Qt vs Gtk vs Tk vs Xt vs Xlib vs GNUstep
Apple II vs Atari 800 vs C=64 vs TRS-80
Atari ST vs Commodore Amiga vs Apple
Macintosh
Motorola vs Intel
Unix vs VMS vs MVS
Microsoft Windows vs Macintosh
USR Pilot vs Apple Newton vs WinCE
RMS vs Bill
Gates
From Christopher Browne's fascinating Internet Data Filtering Talk