Ten-pin bowling ramp in which a bowler will use two hands and push the ball down the ramp onto the lane. There are three widely recognized delivery styles used while the ball is released onto the lane. (See article: Bowling form.) These are the "stroker", "cranker" and "tweener" styles. Lesser used (and newer) styles include "no-thumb" and "two-handed". Strokers often keep their shoulders square to the foul line and their backswing generally does not go much above parallel to the ground. This type of delivery reduces the ball's rate of revolution, thus decreasing its hook potential and hitting power. Strokers rely on
Ten-pin bowling many fictional works. One of the most notable recent examples is "Harry Potter and the Philosopher's Stone" by J. K. Rowling. Although it and its sequels establish that the magical characters featured know nothing about the non-magical (i.e., "real") world, "Philosopher's Stone" reveals that one major character, Professor Albus Dumbledore is a fan of ten-pin bowling. Since the electronic gaming industry began, ten-pin bowling has been seen in many formats on many big name gaming machines. Mattel's Intellivision game line introduced "PBA Bowling", the first fully electronic bowling game, in 1980. JAMDAT Mobile (now known as EA Mobile), made the