Most of us have become aware of quantum computing in recent years. As is often the case with significant scientific and technical advances, the origins occurred decades ago. Subsequent theorizing, elaborating, tinkering and engineering have stretched over the intervening decades. Then, all this work results in various prototypes. Eventually, reasonably finished products appear that an end-user without a Ph.D. and a supporting lab team can use.
Quantum computing is the use of quantum phenomena such as superposition and entanglement to perform computations. Computers that perform quantum calculations are known as quantum computers.