Little Joe (Baltimore and Ohio locomotive)

The term "Little Joe," when referring to a Baltimore and Ohio Railroad (B&O) locomotive, is actually a misnomer. The name "Little Joe" is more commonly associated with the Milwaukee Road's electric locomotives, specifically the EF4 class. The B&O did not operate any locomotives known by that nickname. Therefore, attributing "Little Joe" to a B&O locomotive is historically inaccurate. The term most likely arose through confusion or misremembering the association with the Milwaukee Road locomotives. B&O's electric and diesel fleets had their own distinct class designations and nicknames that do not include "Little Joe."