In the school of physics, there is a fundamental theory called "Quantum Mechanics" which describes the physical properties of nature on the minute scale of atoms and subatomic particles.
Quantum computing adopts the principles of quantum mechanics for the purpose of developing computer technology.
The way that classic computers encode information is in small bits that have either the value of 1 or 0. Quantum computing takes this process a step further by including the "subatomic particles" in quantum terms - qubits - allowing for a wider computing range.
In particular, quantum computing is based on two features of quantum mechanics: superposition and entanglement.
Quantum computing is used in intelligence, military affairs, finance, digital manufacturing and artificial intelligence (AI).