This book introduces a general hardware acceleration technique that can significantly speed up finite difference time domain ‎(‎FDTD‎)‎ simulations and their applications to engineering problems without requiring any additional hardware devices‎.‎ It provides detailed code demonstration and analysis to help readers get the step‎-by‎-step guidelines using the vector arithmetic logic units ‎(‎VALU‎)‎ in the CPU and demonstrates the detailed implementation techniques of VALU to the parallel FDTD method and presents a large number of engineering applications‎.‎ It also introduces the cloud computing concept and engineering applications and presents a 3D parallel FDTD code‎,‎ accelerated by using the VALU‎.‎ The authors of this book were previously university researchers who built a successful commercial enterprise based on their superior computer performance in electromagnetics simulations and number‎-crunching The multi‎-core CPU computers and multiple CPU work stations are popular today for scientific research and engineering computing‎.‎ This book introduces a general hardware acceleration technique that can significantly speed up FDTD simulations and their applications to engineering problems without requiring any additional hardware devices‎.‎‎"‎