I recently posted An Introductory History to Astrolabes over at PACHS. There seemed to be considerable interest in that post, so I expanded it a bit and converted it to an ePamphlet. Much of the material comes out of my introduction to the history of science course. The goal was to produce a convenient introduction that educators at colleges and universities as well as at museums could use. It would be wonderful if general readers would also find it useful.