FreeBSD Security features

[bsd hack]

Hi,
    I have been trying to understand the security features of FreeBSD. I have read the FreeBSD handbook... I have seen that FreeBSD is mentioned as the most secure OS to use. I dont understand why it's security features are considered to be better than that of the other OS's. I'm kind of new to this and haven't done much research on this.
 
I'm basically trying to understand the security features of FreeBSD... Can somebody give me pointers to  a few useful links which will help me in understanding the security features in different OS's and how FreeBSD differs.
 
-HKR

		
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