Electronics is the branch of science and technology which makes use of the controlled motion of electrons through different media and vacuum. The ability to control electron flow is usually applied to information handling or device control. Electronics is distinct from electrical science and technology, which deals with the generation, distribution, control and application of electrical power. This distinction started around 1906 with the invention by Lee De Forest of the triode, which made electrical amplification possible with a non-mechanical device. Until 1950 this field was called "radio technology" because its principal application was the design and theory of radio transmitters, receivers and vacuum tubes.
The concept electronics is used for electronic components, integrated circuits, and electrical systems. Main areas of usage are modern information technology and telecommunications, tools for recording and playing sound and picture, sensors and steering systems, instrumentation and measurement devices. Electronics, information technology and communication technology have undergone immense growth during the past 30 years. Our new technology-based lives are run by the development of miniaturized electrical circuits (microchips) and broadband phone and internet through optical fibers or across wireless channels.
Within transportation we have advanced electrical navigation systems, landing systems for planes, and anti-collision systems for ships and cars. Automatic toll stations across the biggest cities provide money for new roads and environmental friendly traffic. Modern cars are provided with constantly advancing electronics, such as airbag systems, ABS breaks, anti-spin systems and theft alarms.
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