Computer keyboards; Computer game cartridges; Computer mouse; Signs, luminous; Flashing safety lights; Earphones; Headsets for playing video games; Optical couplers; Circulators in the nature of electronic components; Electronic chips for the manufacture of integrated circuits; Electrical ducts; Electrical inductors; Infrared sensors; Light emitting diodes (LEDs); Resistances, electric; Transistors; Condensers; Triodes; Electron tubes; Semiconductor devices