This textbook describes in accessible, straightforward terms the conducted and radiated mechanisms by which Electromagnetic Interference (EMI) sources can compromise or disable a range of critical devices and services. A partial list of examples in this volume include power mains transients, electrostatic discharge, telecom disturbances and computer lock-up. The author presents and analyzes many documented cases, with quick predictions and practical solutions leading to ElectroMagnetic Compatibility (EMC) proposed through simple troubleshooting insights. Essential legal/military EMC requirements are also described in brief, along with a set of simple EMC test and measurement hints. Compiled with limited mathematics and an engaging narrative writing style, the book is ideal for professional engineers and non-specialists alike.