This book presents peer reviewed articles from the Conference on Vacuum Electronic Devices Applications (VEDA2024) held at Pilani in India. Like its previous editions, it focusses on new ideas and the latest developments in research and industry on topics like technologies for vacuum electron devices (VEDs) or Systems and Subsystems employing VEDs, RF, HPM, and THz Components, Devices & Systems, RF, MW & mm-wave, Antennas and EM Simulations, Materials, power systems and components for VEDs, High emission density cathodes for VEDs, Applications of VEDs, Future trends & competing technologies. It brings together scientists, industrialists, academicians, and research scholars to exchange ideas and present latest developments in the field.