Self-powered from the RS-232 port, this micro-sized reader is the ideal LTC input to a PC, Mac or SGI. Four opto-isolated GPI outputs which trigger at user selectable times enable the reader to control multi-event sequences. These GPIs may also be directly activated via the serial port. Two GPI inputs may be assigned as triggers for operations such as a time capture. An advantage of this reader is that its operation is fully configurable from the computer. Computer software utilities are included. Applications include logging, time stamping, timing and time code verification among others.