Airline codes are unique identifiers assigned to airlines and airports, typically consisting of two or three letters. These codes help streamline communication and operations in the aviation industry. For example, the International Air Transport Association (IATA) assigns codes like AA for American Airlines and LAX for Los Angeles International Airport. These codes are essential for ticketing, baggage handling, and flight scheduling. They simplify the travel experience by allowing passengers to easily identify airlines and destinations. Additionally, the International Civil Aviation Organization (ICAO) uses a different set of codes, which are four letters long, for more technical purposes.