Comparative Survey of UNIX, Linux, Windows7 Operating System

Here I has given the Comparative Survey of Unix, Linux and Windows 7 Operating System. First in brief I has given their history. Then compared their Design principles and then compared the Security provided by Unix, Linux and Windows 7 O.S. Finally i illustrate the comparison between Unix and Linux and then between Unix/Linux and Windows 7. By these Comparative Review Linux is found to be most secure O.S. and Open Source since it is available freely. Thus becoming the more Popular than Unix.