Clearly describe quantum computing.

Quantum computing is a type of computing technology that is based on quantum mechanics principles rather than the classical mechanics principles that are the basis of classical computers. Rather than relying on the binary system of ones and zeroes as classical computers do, quantum computers use quantum bits or qubits, which can exist in multiple states simultaneously due to a quantum phenomena known as superposition. This allows quantum computers to perform certain calculations much faster than traditional computers can, particularly with problems that involve complex calculations or large data sets. The technology is still in its early stages of development, but it has the potential to revolutionize fields such as cryptography, machine learning and materials science, among others.