newer organs

After the panpipes, people learned to use water hydraulic systyms to pump air to the pipes, then belows, then there was the first cathedral organs which could only play one note at a time. Those keys were so big that it took one's whole hand to press a key. Then, finally, they began making modern pipe organs that were pumped by people while the organist played. And now we mostly use electricity to run the belows of the pipe organs. some organs are electric all together. Some organs don't even sound like an organ, such as hammond organs, used in jazz and rock.