The talk explores the rapidly advancing field of terahertz (THz) technology, tracing the journey from the selection of suitable materials and device technologies to the development of fully integrated THz systems. The talk will cover key challenges in THz generation, detection, transmission, fabrication, and system integration, as well as emerging solutions and potential applications in high-speed communication, imaging, sensing, spectroscopy, and healthcare. The talk will offer a broad perspective on how advances at the material and device levels are enabling the development of practical THz systems.