The S type carriages are a corridor-type passenger carriage used on the railways of Victoria, Australia. The first carriages were constructed by the Victorian Railways in 1937 for use on the Spirit of Progress, with additional carriages built for other trains until the mid-1950s. Introduced by Victorian Railways Chairman of Commissioners Harold Clapp for the Spirit of Progress service between Melbourne and Albury, the carriages lasted through many decades of regular service, with more than one operator.