The transportation sector is a category of companies that provide services to move people or goods, as well as transportation infrastructure. Technically, transportation is a sub-group of the industrials sector according to the Global Industry Classification Standard (GICS). The transportation sector consists of several industries including air freight and logistics, airlines, marine, road and rail, and transportation infrastructure. These industries are further broken down into the sub-industries air freight and logistics, airlines, marine, railroads, trucking, airport services, highways and rail tracks, and marine ports and services.