operating system

windows 7 operating system
http://katproxy.com/hp-operating-system-dvd-windows-7-professional-32-bit-mui-t4020756.html
windows 8.1 operating system
http://katproxy.com/windows-8-1-april-update-x86-x64-12in1-activated-naswari-zohaib-t9005446.html
linux
http://sourceforge.net/projects/linuxlite/files/1.0.8/linux-lite-1.0.8-32bit.iso/download
ubuntu
http://sourceforge.net/projects/linuxlite/files/1.0.8/linux-lite-1.0.8-32bit.iso/download
mac
http://katproxy.com/mac-os-x-10-8-mountain-lion-iso-untouched-t6613628.html
arch linux
http://mirror.cse.iitk.ac.in/archlinux/iso/2014.05.01/ 
windows xp
http://katproxy.com/windows-xp-pro-sp3-french-updated-13-05-14-t9119455.html
cefarix
 http://sourceforge.net/projects/cefarix/
cp
 http://www.seasip.demon.co.uk/Cpm/software/index.html
debian gnu
 http://www.debian.org/ports/hurd/hurd-cd
ecos
 http://ecos.sourceware.org/getstart.html
fiasco
 http://os.inf.tu-dresden.de/fiasco/download.html
free-vms
 ftp://freevms.nvg.org/pub/vms/freevms/
free bsd
 http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/mirrors.html
free dos
 http://www.freedos.org/download/