Modern-day air-conditioning was created in the early 20th century based on the vision and works of Hermann Rietschel, Alfred Wolff, Stuart Cramer, and Willis Carrier. Cramer, a textile engineer in Charlotte, North Carolina, is credited with coining the phrase “air-conditioning” in 1906. Willis Carrier, though he did not actually invent air-conditioning or take the first documented scientific approach to applying it, is credited with integrating the scientific method, engineering, and business of this developing technology and creating the industry we know today as heating, ventilating, and air-conditioning (HVAC).