"Foot Pound Force" is an Imperial unit for 'Energy And Work' expressed as $ft-lbf$.
http://en.wikipedia.org/wiki/Foot-pound_force?oldid=453269257
https://cdd.iec.ch/cdd/iec62720/iec62720.nsf/Units/0112-2---62720%23UAA443
http://dbpedia.org/resource/Foot-pound_force