Two major symposia include SPIE Sensing Technology + Applications and SPIE Defense + Security. SPIE Defense + Security has, for more than 20 years, featured conferences and courses on infrared systems, lidar and radar, laser technology, image processing, data analysis, intelligence, surveillance, reconnaissance systems (ISR), display technologies, unmanned systems and robots, CBRNE, cyber sensing and security, biometric technology, law enforcement, energy harvesting, and more. SPIE Sensing Technology + Applications focuses on commercial sensing and imaging topics and further development of affordable technology options with civilian applications. This includes lasers, healthcare, thermo-sensing, spectroscopic sensing, detection in industrial applications, industrial robotics, machine vision, fiber optic sensors, food and water safety, process control, petrochemical explorations, earth and climate monitoring, photo-sensing, and more.