"The city also hosts large branch offices of Cigna, AT&T, T-Mobile USA and UBS. McKee Foods Corporation, maker of Little Debbie brand snack cakes, is a privately held, family-run company headquartered in nearby Collegedale, Tennessee.Notable companies that have manufacturing or distribution facilities in the city include Alstom, BASF, DuPont, Invista, Komatsu, Rock-Tenn, Plantronics, Domtar Cor" . . . . .