14 CFR § 256.3 - Definitions.
For purposes of this part:
Availability means information provided in displays with respect to the ability to make a reservation on a particular flight.
Display means the presentation of air carrier or foreign air carrier schedules, fares, or availability to a consumer or agent or other individual involved in arranging air travel for a consumer by means of a computer or mobile electronic device.
Electronic airline information system or EAIS means a system that combines air carrier or foreign air carrier schedule, fare, or availability information for transmission or display to air carriers or foreign air carriers, ticket agents, other business entities, or consumers.