Transistors are electronic devices that can amplify or switch electronic signals and electrical power. They are the fundamental building blocks of modern electronic devices, such as computers, smartphones, and televisions. Transistors are typically made of semiconductor materials, such as silicon, and they consist of three terminals: the collector, base, and emitter. By controlling the flow of electrons between these terminals, transistors can regulate the electrical current passing through them, allowing them to perform a variety of functions in electronic circuits. Transistors revolutionized the field of electronics and have played a crucial role in advancing technology over the past several decades.