Electronics deals with electrical circuits that involve active electrical parts like vacuum tubes, transistors, diodes and integrated circuits, and associated passive interconnection technologies. The nonlinear behaviour of active parts and their ability to regulate negatron flows makes amplification of weak signals doable and electronics is wide utilized in science, telecommunications, and signal process. The flexibility of electronic devices to act as switches makes digital science doable. Interconnection technologies like circuit boards, electronics packaging technology, and alternative varied kinds of communication infrastructure complete circuit practicality and remodel the mixed parts into a daily operating system. Electronics is distinct from electrical and electro-mechanical science and technology, that deals with the generation, distribution, switching, storage, and conversion of current to and from alternative energy forms exploitation wires, motors, generators, batteries, switches, relays, transformers, resistors, and alternative passive parts. This distinction started around 1906 with the invention by Lee electrical engineer of the thermionic tube that created electrical amplification of weak radio signals and audio signals doable with a non-mechanical device. Till 1950 this field was referred to as "radio technology" as a result of its principal application was the planning and theory of radio transmitters, receivers, and vacuum tubes. Today, most negatronic devices use semiconductor parts to perform electron management. The study of semiconductor devices and connected technology is taken into account a branch of solid state electronics, whereas the planning and construction of electronic circuits to unravel sensible issues return below electronic engineering. This text focuses on engineering aspects of electronics.