North American Bus Industries, Inc. (NABI) was a manufacturer of heavy-duty transit buses with its headquarters, bus manufacturing and assembly operations, located in Anniston, Alabama. Its products ranged from 31-feet to 60-feet in length, and were sold to operators throughout the United States and Puerto Rico. NABI's U.S. operations also include an aftermarket parts division in Delaware, Ohio, and an after-sales service center at Mira Loma, California.

Ikarus was a bus manufacturer based in Budapest and Székesfehérvár, Hungary. It was established in 1895 as Imre Uhry's Blacksmith Workshop and Coach Factory (hun.: Uhry Imre Kovács- és Kocsigyártó Üzeme) and during the Communist era in Hungary it dominated bus markets of the entire Eastern Bloc and its allies.