Pacific series (railcar)
 The Pacific series was a fleet of fifty lightweight streamlined sleeping cars built by the Budd Company for the Union Pacific Railroad in 1949–1950. Each car contained ten roomettes and six double bedrooms. Union Pacific sold several to the Chicago Milwaukee St. Paul and Pacific Railroad (the Milwaukee Road) in the late 1960s; Amtrak purchased most of the fleet in the early 1970s. Several remain in use as business cars.