The field of electronics is a branch of physics and electrical engineering
that deals with the emission, behaviour and effects of electrons using
electronic devices. Electronics uses active devices to control electron flow
by amplification and rectification, which distinguishes it from classical
electrical engineering, which only uses passive effects such as resistance,
capacitance and inductance to control electric current flow.
Electronics has hugely influenced the development of modern society. The
central driving force behind the entire electronics industry is the
semiconductor industry sector, which has annual sales of over $481 billion as
of 2018. The largest industry sector is e-commerce, which generated over $29
trillion in 2017.
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