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A positive organ (also positive organ, positive organ, portable organ, chair organ, or straight positive, positive, positive or chair) (from the Latin verb, “space”) is a small, usually manual, pipe built to be more or less mobile. Organ. It was practiced in sacred and secular music between the tenth and eighteenth centuries,Baso as a chamber organ between the chapel and the small church and for continuity in congregation works. [1] The smallest common positive, much tougher than the keyboard, is called the book or box organ, and is especially popular today for continuous work; Positivity is higher for more unique uses.