bn:01922436n
Noun Named Entity
Categories: United States Postal Service, Postal infrastructure, Postal history, Postal services, History of rail transportation in the United States
EN
Railway Mail Service  railway post office  Railroad post office  Railway Travelling Post Office  RPO
EN
In Canada and the United States, a railway post office, commonly abbreviated as RPO, was a railroad car that was normally operated in passenger service as a means to sort mail en route, in order to speed delivery. Wikipedia
Definitions
Sources
EN
In Canada and the United States, a railway post office, commonly abbreviated as RPO, was a railroad car that was normally operated in passenger service as a means to sort mail en route, in order to speed delivery. Wikipedia
The Railway Mail Service of the United States Post Office Department was a significant mail transportation service in the US from the mid-19th century until the mid-20th century. Wikipedia
US mail transportation service until the mid-20th century Wikidata