Bose Einstein Condensates and Atom Lasers Proceedings of the International School of Quantum Electronics 27th course on Bose Einstein Condensates and Atom Lasers October 19 24 1999 Erice Italy. Since the experimental demonstration of Bose Einstein Condensation in dilute atomic gases there has been an explosion of interest in the properties of this novel macroscopic quantum system. The book covers the methods used to produce these new samples of coherent atoms their manipulation and the study of their properties. Emphasis is given to the anticipated development of new types of sources which more and more resemble traditional types of lasers. Because of recent new applications and increasing demand for lasers sensors and associated instrumentation the chapters also cover current developments in the basic techniques materials and applications in the field of the generation of coherent atoms. Experimental Studies Of Bose Einstein Condensates In Sodium Measurement Of The Relative Phase Between Two Bose Einstein Condensates Intertwined Bose Einstein Condensates Coherent Atom Optics With Bose Einstein Condensates Non Linear Atom Optics With Bose Einstein Condensates Momentum Distribution Of A Bose Condensed Trapped Gas Atom Optics With Bose Einstein Condensates Generating And Manipulating Atom Laser Beams Multiple 87Rb Condensates And Atom Lasers By RF Coupling Theory Of A Pulsed RF Atom Laser The Atomic Fabry Perot Interferometer RF Induced Evaporative Cooling And BEC In A High Magnetic Field Dissipative Dynamics Of An Open Bose Einstein Condensate Non Ground State Bose Einstein Condensation Towards A Two Species Bose Einstein Condensate Atom Interferometry With Ultra Cold Atoms Classical And Quantum Josephson Effects With Bose Einstein Condensates Josephson Qubits For Quantum Computation Addressing Single Sites Of A CO2 Laser Optical Lattice Scissors Mode And Superfluidity Of A Trapped Bose Einstein Condensed Gas Experiments With Potassium Isotopes Equilibrium State And Excitations In Trapped Fermi Vapours Photoassociative Spectroscopy Of Cs2.