Operating System Installation
The Service is for installing the operating system. The Price can be considered as Service charge for Installing the software ( The cost for buying the operating system is Extra) 

  • Operating Systems Instance means a single installation of an operating system on a non -virtualized physical server or Virtual Machine.License NotesYou may use the Software for up to the number of Operating Systems Instances for which You have paid the applicable license fees.
Benefits :

It is a responsibility of an operating system to make sure each data present inside them is secure
Sharing Resources

Operating system also provides the opportunity to share resources with other users

Multitasking is another important feature of an operating system
User Friendly

The interface provided by the GUI is much more user friendly compared to a command line interface

Price :

on inspection