Computer Reservation System (CRS): A system set up by airlines to automate bookings and reservation of airline seats and then “licensed” to a travel agency or tour operator for use in-house or containing information about scheduled, availability fares, related services and through which reservations can be made and tickets issued. A computerised system used to access information about schedules, availability, fares, and other travel formalities. Means a computerised system containing information about schedules, availability, fares and related services, and through which reservations can be made and/or tickets issued, and which makes some or all of these facilities available to subscribers. It is a means of communication between agents and airlines, through which reservations can be made and tickets and itineraries issued. Means a computerised system containing information about: Schedules / Availability / Fares and related services / Reservations / Tickets issued.