Companies that develop, operate, manage, lease, sell, broker, appraise, or invest in residential and commercial real estate property holdings (including free trade zones, industrial parks, special zones, shopping malls, mixed use developments, and others).

Companies that provide air transportation of passengers or cargo over regular routes and on regular schedules. The industry includes low-cost carriers, but excludes regular and high-end carriers.

Companies that provide support services to airport operations including rental of hangar space, baggage and cargo handling, aircraft parking services, airport runway maintenance, aircraft fueling, aircraft storage, aircraft maintenance, vacuuming airport runways, aviation clubs, and other services.

Companies that provide chartered air transportation services of passengers, which operate on unscheduled schedules and routes.

Companies that provide air transportation services of passengers and cargo using airplanes, helicopters, and other aircraft. The industry includes companies that operate airlines, air freight, airports, and companies that provide them with support services.

Companies that provide air transportation of passengers or cargo over regular routes and on regular schedules. The industry includes regular and high-end carriers, but exclude low-cost carriers.

Companies that provide air transportation of cargo without transporting passengers on a scheduled or non-scheduled (charter) basis. The companies include door-to-airport freight air transportation such that the company provides the goods pick-up at the origin city and transports them to the destination's airport; pick-up of the shipment at the airport, customs clearance, and other duties are not included.

Companies that provide transportation services (including air, ground, and maritime transportation in addition to logistics services) and design, manufacture, assemble, and distribute transportation products (including aircrafts, automobiles, boats, and rail products).

Companies that provide transportation services of passengers and cargo through air, water, ground, and rail; companies that provide postal and messenger services; and companies that provide support services to the industry.

Companies that develop and own commercial and residential real estate properties for sale or rent. The developers generally acquire land for their projects.

Companies that provide air transportation of passengers over regular routes and on regular schedules (scheduled airlines) or on an unscheduled basis (charter airlines). Airlines either own or lease aircraft with which they supply these services.

Companies that provide air transportation of cargo. The industry includes scheduled air freight carriers that transports goods over regular routes and schedules in addition to chartered air freight carriers that provide non-scheduled cargo transportation.

Companies that support airport operations such as providing valet parking, shuttle transportation, taxi starters, janitorial services, and other services.