Computers used diodes as transistor in early computers. The
introduction of these microcontrollers marked a critical moment in the
computer history. They revolutionized computers making it possible for
embedded systems, IoT (Internet of Things), automated systems, and
most importantly faster computers. Our computer's computing powers
have been doubling each year for 25 years. They are now capable of
handling massive datasets which was unthinkable 25 years ago.
Soon, computers will step up in how they compute. They will start
to use quantum mechanics, such as superposition, quantum
entanglement, and quantum gates. They will revolutionize cryptography
because of these quantum things. However, the quantum computers
still have many limitations. They are very sensitive to external
environments, and as such they are very prone to error. Right now, they
only function just 1 or 2 degrees above absolute zero temperature. We
still don't know what the future holds for quantum computers.