Det Stavangerske Dampskibsselskap
 Det Stavangerske Dampskibsselskap AS (DSD) is a private Norwegian shipping company that operates internationally through the subsidiary DSD Shipping AS 13 vessels. The group also owns major parts of Tide and Nor Lines. DSD dates back to 1855 when it was founded. Head offices are located in Stavanger.In 2007 the group sold its former subsidiary Stavangerske to the newly founded Tide ASA. Tide was the result of the merger between Hardanger Sunnhordlandske Dampskipsselskap and Gaia Trafikk.