You will be given a definition of a task first, then some input of the task.
In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

An IATA airport code , is a three-letter code that can be used to identify airports .
Output:
An IATA airport code , also known as an IATA location identifier , IATA station code or simply a location identifier , is a three-letter code designating many airports and metropolitan areas around the world , defined by the International Air Transport Association ( IATA ) .