Simplify the following text for a Grade 6 native English-speaking person.
Original: An IATA airport code , also known an IATA location identifier , IATA station code or simply a location identifier , is a three-letter code designating many airports around the world , defined by the International Air Transport Association ( IATA ) .
Simplified: An IATA airport code , is a three-letter code that can be used to identify airports . This removes the need to write the name of the airport in full every time it is needed , instead an IATA code can be used .