It means the operating system used in enterprise.
When a corporation needs 100 computers to have OS, it has to order enterprise OS packages from M$.
A hyperlink is a feature that takes you to a different page when you click on it. That page could be part of the same website or a totally different website.
Let me know if you have any questions.
The output will be 10.
The while loop runs until numb is equal to or less than 13.
25 - 5 = 20
20 - 5 = 15
15 - 5 = 10, which is less than 13 so the loop stops and 10 is printed to the screen.