Norton Ghost 15.0 1U No Operating System

Hello:

I just went to an online store to purchase Norton Ghost 15 and discovered there are different flavors:

(1) 15.0 (1 PC)

(2) 15.0 1 U No Operating System

 

Does the "No Operating System" mean that you just boot up on the CD and take it from there?  In other words, you don't install it.  It only runs from CD and can probably service disks on XP, Vista and Windows 7?

 

Thanks in advance,

Rich Locus