There is a letter followed by numbers on a horse registration. What do the different letters, A, I, L, N, P, Q, T, U, and X stand for?

McGruff

This is from the American Quarter Horse Association, and I don't really know if it applies to all horses. Explanation of Registration Numbers Letter A in front of number means Old Appendix Horse Letter I in front of number means International Horse that traces back to American Quarter Horses Letter L in front of number means Appaloosa Horse, also AP in last two positions of name Letter N in front of number means National Quarter Horse Breeders Association Letter P in front of number means Paint Horse, also PT in last two positions of name. Letter Q in front of number means American Quarter Racing Association Horse Letter T in front of number means Thoroughbred Horse, also year foaled in last two positions of name Letter U in front of number means Unregistered Horse Letter X in front of number means New Appendix Horse http://www.aqha.com/association/registration/generalglossary.html Oct 13 07, 9:08 PM