Lots of us use our computers for a large part of the day, and unfortunately some of us suffer from varying degrees of repetitive stress problems from using a mouse. My wife is a sufferer, and she has gotten a lot of relief from switching to the Evoluent VerticalMouse. But the Evoluent VerticalMouse isn’t a perfect solution. First, it is a rather wide mouse, and it’s not easy to get used to using. Second, an Evoluent VerticalMouse isn’t cheap, running between $90 (for a wired version) and $110 (for a wireless version) on Amazon. Recently my wife tried a new brand of vertical mouse, and it is very much like an upgrade from an Evoluent VerticalMouse, as it has improved on the design in several ways...and on top of that, it’s inexpensive! Available either in a wired (USB) or wireless version. Anker Vertical Ergonomic Optical Mouse http://www.ianker.com/search.php?search=1&keywords=vertical%2Bmouse Wireless $18 http://www.amazon.com/Anker-Wireless-Vertical-Ergonomic-Optical/dp/B00BIFNTMC/ or http://is.gd/jYuF7y Wired (USB) $10 http://www.amazon.com/Anker-Vertical-Ergonomic-Optical-VerticalMouse/dp/B00C9X9RWI/ or http://is.gd/QdT979 ___________________________________________ Randy B. Singer Co-author of The Macintosh Bible (4th, 5th, and 6th editions) Macintosh OS X Routine Maintenance http://www.macattorney.com/ts.html ___________________________________________