"Version: 20220701"--Title page verso.Includes bibliographical references.1. Introduction -- 1.1. Introduction2. Overview figures for a method of understanding quantum computing -- 2.1. What quantum-gated computing needs in its algorithms -- 2.2. Every reversibility in quantum circuits is by virtue of exclusive OR -- 2.3. Equivalence of the circuits by virtue of superposition of qubits to be ap…