Electronic devices that are worn on the body or clothes. The first wearable computing devices were body-worn computers in the military, followed by consumer products such as MP3 players strapped to the arm and fitness devices that compute distance and heart rate. As of 2016, smartwatches, heads-up augmented reality displays, healthcare monitors and smart clothing are wearable technology products. Wearable electronics is expected to be a growth industry. See augmented reality, POV camera, fitness tracker, smart clothes, body-worn computer, smartwatch and Google Glass.