For AC Hotels Marriott reservations, the hotel uses a different kind of software, like Micros Opera as PMS. And it was majorly used in North American properties, later they also come into contact with the Micros system and it becomes part of it. It makes the process easy as well as makes things easy like reservation and track records. The best part is that they also let users make changes to the booking online that automatically updates here and the hotel know about it. This system is now majorly used in the different parts of the world and no doubt boost overall efficiency too.