DC-1 (disambiguation) DC-1 or DC1 may refer to: Douglas DC-1, an American airliner design Pirs (ISS module), also known as DC-1 (Docking Compartment 1) C0 and C1 control codes#DC1, computer control codes Topics referred to by the same termThis disambiguation page lists articles associated with the same title formed as a letter–number combination.If an internal link led you here, you may wish to change the link to point directly to the intended article.