The Knowledge of principles and processes for providing customer and personal services. This includes customer needs assessment, meeting quality standards for services, and evaluation of customer satisfaction, principles and methods for describing the features of land, sea, and air masses, including their physical characteristics, locations, interrelationships, and distribution of plant, animal, and human life, principles and methods for showing, promoting, and selling products or services. This includes marketing strategy and tactics, product demonstration, sales techniques, and sales control systems, principles and methods for moving people or goods by air, rail, sea, or road, including the relative costs and benefits, the structure and content of the English language including the meaning and spelling of words, rules of composition, and grammar.