Touchpads seem not to be a mature technology. For several years I have been using a trackball, but like mice, it is impossible if you have furry cats that shed. I am ready to move to a touchpad. The problem is that I have not seen a comparative review, and the usual squibs give no idea of which of the several quite different designs is best for a given purpose. Has anyone on this list read a comparative review or, better yet, tried more than one brand of touchpad? I would be delighted if I could get some advice. -- Nathan Sivin History and Sociology of Science University of Pennsylvania Philadelphia PA 19104-3325 (nsivin@xxxxxxxx)