Well back in the early days when Chrondek was the major player of timing devices, timers would read 6 photocells-- pre stage, stage(start line) , guard beam, start speed, finish line, stop speed. MPH was looked up on a conversion chart ( converting time in the trap ) to MPH (think VASCAR). Tom Haggin (RIP) of TSI,Bob Brockmeyer of CompuLinkstarted producing systems that were DOS and/or Windows based. this opened the world for timing equipment. Program what you want conceivably get a time every foot if you want to spend $$$ for all the equipment necessary. Could probably write a book on all the different timers available now and some that were not well known such as DigiTime.