The organ is an instrument that dates back to the 3rd century BC. The man credited for this invention is Ctesibius of Alexandria who invented an instrument called the hydraulis, which used the wind maintained through the water pressure to some pipes. The organs are most likely found in churches and are used during services. Its divine tone mimics that of the human voice and creates a beautiful sound that many find pleasing. There are three types of organs: pipeless, electronic, and mechanical organs. Pipeless organs are very similar to accordions and harmonicas. Electronic organs produce electronically produced sounds through speakers. So mechanical organs are usually controlled by pinned pipes or music books. The organ is a keyboard instrument with one or more manuals and usually a pedal board. Manuals are keyboards that you play with your hands, and pedalboards are keyboards that people play with their feet. The sound emission of the organ is continuous and constant as long as a key is held down. It is up to the player to determine how long a key is pressed. One good thing about organs is that the volume of the organ's sound does not depend on how hard you hit the keyboard. A person can gently stroke the keys and it does not affect the volume or note produced by the organ. But pianos are very different. The volume of a piano can be raised and lowered depending on how hard you use to strike the keys. There are many types of organs with different purposes including church organ, concert organ, pipe organs, chamber organs, theater organs, pipe organs, chord organs, electronic organs and more! The pipe organ is the largest musical instrument..... .middle of paper......The feature of having not only a keyboard but also a pedal board gives them a greater advantage over a pianist. Also the tone of the organ does not fade while you hold down the key like a piano. It ensures that the sound is constant and lasts without decay. Organs can have multiple keyboards, which makes it unique because you could play two different sounds with both hands. The organs are also unique because they are not portable. They have to be built for the room they will be in, so there aren't many of them the same most of the time. Organs are a very ancient and sophisticated instrument. The design and sound are very unique compared to other instruments. From the size and uses of the organ, you can use them almost anywhere and have fun. It is probably one of the best instruments invented from the sound it produces to its structure and construction.