Illawarra Pipe Band early 1970's decade with Bob Webber on the front right and John Hamilton on the back left are both still playing with Illawarra Pipe Band.
Bagpipes originally started with a bag which holds the air supply, a chanter which plays the melody notes and most likely a single drone, the drone plays a continuous note, the second drone was added in the late 1500s while the third or great drone emerged in the early 1700s. There are various types of Bagpipes in Scotland but the one to emerge as the national instrument is the Highland Bagpipe, the piob-mohr 'the Great Pipe'. The term "Bagpipe" can be used to refer to one, two, three, four or more, Wikipedia entry 'pipers most commonly talk of "the pipes", "a set of pipes", "a stand of pipes".