Variable Conductivity
Semiconductors act as both conductors and insulators
Doping
Adding dopants control conductivity for specific functions.
Wide Applications
Powering everything from phones to cars.

Transistors
semiconductors act as tiny switches/amplifiers, the basis of electronics.
Integrated Circuits (ICs)
Called Microchips, Millions of transistors on a chip.
Material Variety
Silicon and other materials for specialized uses.