1999 24 Mar. e6/1 The [races]..will be two of the first races in the state to incorporate ‘chip’ timing, in which runners affix a small plastic device containing a computer microchip to one of their shoelaces.
2020 @irunoffroad 28 Apr. in twitter.com (accessed 2 Nov. 2020) I guess with chip timing starts could be staggered rather than a huge mass of runners all starting together?