Entity-Relationship Diagram (ERD)

This hotel computer reservations system cycle process chart example was redesigned from the Wikimedia Commons file: По-запросу.jpg.
[commons.wikimedia.org/ wiki/ File:По-запросу.jpg]
"A computer reservations system or central reservation system (CRS) is a computerized system used to store and retrieve information and conduct transactions related to air travel, hotels, car rental, or activities. ...
Modern GDSes typically allow users to book hotel rooms, rental cars, airline tickets as well as activities and tours." [en.wikipedia.org/ wiki/ Computer_ reservations_ system]
The cycle process diagram example "Hotel reservation system" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Sales Flowcharts solution from the Marketing area of ConceptDraw Solution Park.