1. Electric Propulsion Past, Present and Future2. Introductory Premises3. General Theory of Electric Thrusters4. Gridded Ion Thrusters5. Hall Thrusters6. Hollow Cathodes for Ion and Hall Thrusters7. Electrothermal Thrusters8. Electromagnetic Thrusters9. Applications and Systems Aspects10. Final ConsiderationsAppendixA. Basic Plasma PhysicsB. Testing Procedures, Facilities and DiagnosticsC. Physical Constants and Conversion Factors