This group gathers electrical engineering inventions that are themselves electronic building blocks rather than complete consumer devices, including the transistor, diode, triode, vacuum tube, capacitor, resistor, rectifier, transformer, integrated circuit, printed circuit board, circuit breaker, electrical fuse and relay, display components such as the LED, LCD and OLED, measuring instruments such as the oscilloscope and voltmeter, the touchscreen, solenoid, and specialised switching devices such as the KosherSwitch, Sabbath Mode circuit and ZMAN Switch. Their shared work is a discrete electronic part or switching mechanism that a larger device is built from, as distinct from the complete communication, lighting, recording or household devices those parts go into.