What are differences among these versions?
If your hotel has full board/half board packages, you can use Bistone Hotel Management System Full Board Version.
If not, you can use Bistone Hotel Management System Standard Version.

And, if your hotel has some restaurants/Bars/SPAs, you can use +Restaurant Version, such as:
Bistone Hotel Management System Full Board +Restaurant Version
or,
Bistone Hotel Management System +Restaurant Version