PC CLOCK 1.2 A COMPUTER CHRONOGRAPH Up, Down, Lap, Race, Game, and Split Timers- Calibrate your computer for three levels of timing precision then use the UP, DOWN, LAP, RACE, GAME, AND SPLIT timers to time the laps in the Indy 500, a professional football game, a scientific experiment, the Boston Marathon, a schools track meet. Utilities - Other MACGREGOR K. PHILLIPS