The Nederlandsche Stoomboot Maatschappij ( ), abbreviated as NSM or NSBM, was a Dutch shipping line focused on inland navigation. In the 1820s it was important for the quick introduction of steam power on the Dutch rivers and on the Rhine. NSM owned the major shipbuilding company Fijenoord.

Fijenoord was a shipbuilding company and machine factory in Rotterdam the Netherlands from 1823 to 1929. In 1929 it merged with Wilton to become Wilton-Fijenoord.