ok then...

[lhuser]

Windows 1.0, 2.0, 3.0, 3.1, 3.11, NT 3.1, NT 3.51, 95, 98, 98SE, NT 4.0 workstation, NT 4.0 server, 2000, ME, XP home, XP Pro, XP MCE, 2003, LH, Vista

yellow dog, suse, mandrake, mandriva, red hat, fedora, mepis, whole bunch of other distros

MAC versions

BeOS
OS/2
Sky OS
React OS

 

[UK31337]

That guy quite clearly knew Sweet Fanny Adams about computers, let alone hacking.

As for the OSs, I can name these off the top of my head:

DR-DOS
Risc OS
MS-DOS
Windows
Windows 2.0
Windows 3.0
Windows 3.1
Windows For Workgroups 3.11
Windows NT
Windows NT 4.0
Windows 2000 Professional
Windows 2000 Server
Windows 2000 Advanced Server
Windows 2000 Datacenter Server
Windows Me
Windows XP Home Edition
Windows XP Professional
Windows Server 2003
Windows Vista (it's got about 6 different versions, haven't learnt them yet)
SkyOS
CentOS
ReactOS
Linux
Solaris
UNIX
OpenBSD
FreeBSD
NetBSD
MacOS (All versions except X)
MacOS X


And there's sure to be plenty more. That list came directly off the top of my head.

EDIT: lhuser beat me :-(

 

[Rubber314Chicken]

um, mac os x is unix. i can name 5

unix
linux
windows
ms-dos
apple dos
bsd

and a whole bunch of others right here
http://en.wikipedia.org/wiki/List_of_operating_systems

that link ssays that the different versions of windows are different os's/

 

[Natalya1]

LOL that convo made me laugh haha thanx for sharing that man

i gotta love dumb ass people, they are so good for entertainment! lol

 

[Hackslayer]

what a poser and A real hacker never tells you he's there

 

[borat_sagdiyev]

i second that