The NHRA Camping World Drag Racing Series is a drag racing series organized by the National Hot Rod Association (NHRA). It is the top competition series of the NHRA, comprising competition in four classes, including Top Fuel Dragster, Funny Car, Pro Stock, and Pro Stock Motorcycle. The champion of each category is determined by a point system where points are given according to finishing placement and qualifying effort. The season is divided into two segments. After the first 18 races, the Top 10 of each pro category are locked in and compete in the last six races with the difference in points greatly minimized. History The series has four main professional classes: Top Fuel Dragster, Funny Car, Pro Stock, and Pro Stock Motorcycle. Top Fuel was the first category, with Funny Cars added in 1966, Pro Stock four years later and Pro Stock Motorcycles in 1987. Both Top Fuel and Funny Cars regularly see top speeds in excess of today, and one thousand foot times anywhere from 3.70 to 4 seconds. Both these cars burn fuel consisting of 90% nitromethane and 10% methanol. The Pro Stock record is , with times often in the 6.4-6.7 second range and the Pro Stock Motorcycles usually run at 190+ mph (), with times in the low 7- to high 6-second range. Top Fuel (class designation: AA/D top fuel dragster) and Fuel Funny Car (class designation: AA/FC top fuel coupe) have recently been limited to a track, instead of the historic 1/4 mile [], as a means to limit top speeds and increase safety (there had been a number of engine explosions at or near 300 mph resulting in driver injuries and death). Currently, driver and spectator safety has been enhanced even while top speeds often approach and exceed 300 mph. Some of the popular racers to come through the series include "Big Daddy" Don Garlits, Don "The Snake" Prudhomme, and Shirley Muldowney. Those three gained much attention from the 1960s through 1970s with their speed and personalities, a combination rarely achieved today through the political correctness of sponsorship in today's drivers. Nonetheless there are still colorful characters today, such as 16-time Funny Car world champion John Force. His daughter, 2007 Rookie of the Year Ashley Force Hood has made appearances on Good Morning America and The Tonight Show and was voted AOL's Hottest Female Athlete in 2007. On July 2, 2008, following the