Portable organs (the portative and the positive organ) were invented in the Middle Ages. It is also called a portatif organ, portativ organ, or simply portative, portatif, or portativ. With Collins accompanied for the first time by her sister Dolly's portative organ. Organetto refers to two distinct instruments&colon; the medieval organetto, or "portative"; and the modern organetto. The earlier style of keyboard on the portative consists of one button for each pipe. These included the shawm, fiddles, rebec, crwth, portative organ, trumpet, timbrel, lute and bagpipe. Other churches used a portative organ, or no organ at all. The portative is constructed simply in order to make it as portable as possible.