If you haven’t visited the Computer History Museum in Mountain View, California, then this weekend might be a good time to go. On Sunday, they are having a special event celebrating their “Visible Storage” exhibit. This is a terrific exhibit which is going to be closed after December, in preparation for a new exhibit which I hope will be as exciting as this one. Visible Storage consists of literally hundreds of different machines and artifacts from computing history, from old style Napier bones, to the bicycle sprocket computers of Lehmer, to the Enigma machine, ENIAC, Johnniac, personal computers of every make, Crays, hypercubes, Connection Machines… A fascinating collection. If you haven’t had the chance to go see this, make sure you do before it’s gone.