The BlackBerry 10 smartphone model that featured a physical QWERTY keyboard (the "Q" in Q10). The Q10 included all the BlackBerry 10 innovations of the Z10 with the addition of physical keys. See BlackBerry Z10, BlackBerry 10 and BlackBerry.
The Q10 is a touchscreen smartphone with the traditional BlackBerry keyboard. (Image courtesy of BlackBerry, www.blackberry.com)