Companies that offer aviation and flight training products and services, which includes vocational and recreational flight training.

Companies that provide specialized services to the air transportation industry including aircraft maintenance, repair, fueling, inspection services, janitorial services, food catering services, and other services related to air transportation.

Companies that design, manufacture, assemble, and trade in aircrafts (including civilian, commercial, and military planes, helicopters, satellites, and other aircrafts). The industry also includes companies that manufacture and distribute aircraft sample models, aircraft frames, parts, and other components and accessories, and companies that provide repair, maintenance, renovation, conversion, and other support services to aircrafts.

Companies that provide travel services including travel agencies (that act as agents in selling travel, tour, and accommodation services), tour operators (that engage in arranging and assembling tours that they sell themselves or through travel agencies, cruise lines, internet travel and vacation reservations), and other travel services.

Companies that own short-term accommodation facilities (for travelers, vacationers, and other customers), including economy hotels, extended stay and business suites, mid-priced hotels and motels, resorts, as well as upscale and luxury hotels.

Companies that design, manufacture, assemble, and trade in equipment for transporting people and goods (including road automotive equipment, trains, ships, boats, aircrafts, recreational vehicles, and equipment parts). The industry also includes companies that provide repair, maintenance, and other services related to transportation equipment.

Companies that own short-term or temporary stay accommodation facilities for travelers, vacationers, and other customers, may also provide meals, laundry services, and recreational facilities. The industry includes hotels, motels, resorts, residential compounds, rooming and boarding houses.

Companies that own, operate, and manage entertainment, lodging, travel agencies, tour operators, spas, sports and recreation, as well as other leisure facilities.

Companies that provide aircraft inspection, repair, parts replacement, maintenance, and other related services. The companies provide the services for aircraft bodies, interiors, paint, mechanical and electrical repair, and other repair and maintenance.

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.

Learning institutions including childcare, elementary and secondary schools, colleges and universities, vocational schools or institutions, and institutions that provide educational support services.

Institutions that offer instruction and vocational training in a variety of academic and non-academic subjects (including language, fine arts, sports and recreation, and other subjects). Instruction can range from skills for personal enrichment to training for career or educational opportunities.

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 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.

Institutions that offer vocational education, which include technical schools and training centers. The training can range from skills for personal improvement to job-specific certification.

Companies that provide food catering services for airlines.