A quantum computer is a computer based on a computational model which uses quantum mechanics‎,‎ which is a subfield of physics to study phenomena at the micro level‎.‎ There has been a growing interest on quantum computing in the 1990‎'‎s and some quantum computers at the experimental level were recently implemented‎.‎ Quantum computers enable super‎-speed computation and can solve some important problems whose solutions were regarded impossible or intractable with traditional computers‎.‎This book provides a quick introduction to quantum computing for readers who have no backgrounds of both theory of computation and quantum mechanics‎.‎ ‎"‎Elements of Quantum Computing‎"‎ presents the history‎,‎ theories and engineering applications of quantum computing‎.‎ The book is suitable to computer scientists‎,‎ physicists and software engineers‎.‎