A classic computer as it was designed in the mid-20th century can only include two states, the 0 or the 1. This is called binary language. If one imagines now a sphere with two poles connected by a right in its center, the state of an ILO (BInary digiT or binary position) at a given time can be located on only one of these poles at a time, the North Pole representing for example 0 and the South Pole re presenting 1. On the other hand, a QUBIT (Quantum ILO), the elementary unit of the quantum computer, in addition to values 0 and 1, will be able to take between 2 successive states observed all the values corresponding to each point located on the surface of the sphere. It is now easy to understand the absolute superiority of such a machine on all conventional computers, even the most powerful. Even more simply, to find the exit of a maze a classic computer will have to test each path one after the other in as many sequences while the quantum computer will be able to test them all and thus find the solution in one of its Frequencies.