Central reservation system (CRS)
A central reservation system or CRS is a piece of software that helps manage all of a hotel’s booking-related processes. It contains all the information about hotel inventory (rooms), their availability, and rates, shares this data across all distribution channels, and synchronizes incoming reservations in real time.
Integration with a booking engine facilitates online reservation processing, while connection with a channel manager helps avoid overbooking or double-booking across distribution channels (modern CRSs often have these two modules pre-integrated for ease of use).A hotel CRS comes as part of the PMS or a standalone solution. Some of the popular CRS providers are Pegasus, Windsurfer, TravelClick (by Amadeus), SynXis, and eZee.