*Pratt & Whitney (previously part of UTC); this segment is one of three companies which manufacture the majority of airplane engines, both commercial and military
+
*Pratt & Whitney (previously part of UTC); this segment is one of three companies which manufacture the majority of airplane engines, both commercial and military<ref>Connors, Jack. "Pratt & Whitney." Engine History. Web. 3 Dec. 2015. <https://www.enginehistory.org/P&W/pratt_&_whitney.shtml>.</ref>