Overview
Augmented reality (AR) is a form of 3D human-computer interaction that overlays real-time 3D-rendered computer graphics into the real world through a display, such as a handheld device or head-mounted display. With its roots in the early 1990s, AR has evolved significantly, with key milestones including the development of the Virtual Fixtures system by [[u-s-air-force|U.S. Air Force]]'s Armstrong Laboratory in 1992. Today, AR is used in various industries, including gaming, education, and healthcare, with companies like [[google|Google]], [[apple|Apple]], and [[microsoft|Microsoft]] investing heavily in AR research and development. The global AR market is projected to reach $70 billion by 2023, with over 1 billion AR-enabled devices expected to be in use by 2025. As AR continues to advance, it is expected to have a significant impact on various aspects of our lives, from entertainment to education, and from healthcare to commerce.