Why Try a Vertical Mouse or Ergonomic Mouse - Das Keyboard Mechanical Keyboard Blog
Lenovo Go Wireless Vertical Mouse Review | PCMag
Amazon.com: Logitech MX Vertical Wireless Mouse – Advanced Ergonomic Design Reduces Muscle Strain, Control and Move Content Between 3 Windows and Apple Computers (Bluetooth or USB), Rechargeable, Graphite : Electronics
What the heck is a vertical mouse anyway? | PCWorld