Vicor has been a trusted partner in aerospace and defense power solutions since 1981, delivering high-performance, MIL-COTS power modules that combine high density, efficiency, and reliability for air, ground, shipboard, and space applications. This eBook presents real-world case studies demonstrating how Vicor power modules enable mission-critical systems — from HALE UAVs and vehicle-mounted radios to tethered ROVs and satellite platforms — by solving complex power delivery challenges within strict size, weight, and power (SWaP) constraints. Technical articles explore emerging topics such as New Space power requirements, MOSA/SOSA/VPX open architectures, and radiation-tolerant power electronics design. Supported by FAQs, a comprehensive glossary, and engineering tools, this resource serves as a definitive reference for defense and aerospace power engineers.