Applies to the following categories or sub-categories of devices; 1. Semiconductor photoemitters, including: - light-emitting diodes (LEDs); - infrared-emitting diodes (IREDs); - laser diodes and laser-diode modules; - optoelectronic displays (under consideration). 2. Semiconductor photoelectric detectors, including: - photoresistors, photoconductive cells; - photothyristors (under consideration). 3. Semiconductor devices utilizing optical radiation for internal operation, including: - photocouplers, optocouplers.