ELECTRONIC PRECISION TIMERS AND CHRONOMETERS; ELECTRONIC CONTROLS FOR EQUIPMENT-NAMELY, TIMER UNITS, MEMORY STORAGE UNITS, SLAVE READOUT UNITS, DIGITAL PRINTERS, PHOTOCELL AND PICKUP UNITS, LIGHT SOURCE UNITS; AND ELECTRICAL INSTRUMENT-NAMELY, DISPLAY BOARDS, TIMING TOWER, PANEL DISPLAY UNITS, REMOTE TIME DISPLAY UNITS, LAP AND POSITION DISPLAY UNITS