Air conditioning
In 1902, the first modern electrical air conditioning unit was invented by Willis Carrier in Buffalo, New York. After graduating from Cornell University, Carrier found a job at the Buffalo Forge Company. There, he began experimenting with air conditioning as a way to solve an application problem for the Sackett-Wilhelms Lithographing and Publishing Company in Brooklyn, New York. The first air conditioner, designed and built in Buffalo by Carrier, began working on 17 July 1902.
Cramerton, North Carolina
Cramer is credited with designing and equipping "about one-third of the new cotton mills in the South" between 1895 and 1915, and simultaneously acquiring extensive holdings in textile mills. Among Cramer's numerous industrial engineering patents was one for the "Cramer System of Air Conditioning", which included the automatic regulation of temperature and humidity. These early innovations in air conditioning resulted more from the need to remove lint from the air (a persistent problem in the textile mills) than to cool the factory atmosphere. The term "air conditioning" is attributed to Cramer.