An observant pilot looking down at Endicott in the 1920s would see that a third story had been added to the factory (in 1917), along with two one-story buildings known as the East and West Courts. The original one-story ITR facility (center right) now has considerable company compared to the 1915 layout. At the time this photograph was taken (1929), Endicott employed nearly 2,000 IBMers.