What does ACI stand for in the context of air travel?

In the context of air travel, ACI stands for Airports Council International. However, looking at the available options, none directly match the correct full term. The closest relevant choice, when considering what is commonly referenced during check-in in air travel contexts, is the first option, Airport Check-in. This term refers to the process by which passengers register for their flight at the airport, which includes obtaining their boarding passes and checking in luggage if necessary.

The other options, while they may relate to different aspects of air travel, do not accurately capture the standard terminology associated with ACI in the airport context. For instance, Airline Customer Information may refer more broadly to services provided to passengers by airlines rather than the specific process at the airport. Aircraft Capacity Index typically pertains to the technical specifications of an aircraft rather than check-in procedures. Lastly, Airline Check-in Protocol might imply a set of rules or guidelines but is not a recognized acronym in air travel terminology.

Understanding these distinctions is key for anyone studying about airline processes and services.