The document discusses the history and features of wearable computers. It describes how wearable computers evolved from analog computers in the 1960s to devices like smartwatches and augmented reality systems today. The key aspects are that wearable computers are always accessible, allow multitasking even during physical activities, and are designed to be worn comfortably while maintaining full computer functionality. Examples mentioned include early prototypes and current commercial devices like Motorola's wearable PC and Pranav Mistry's Sixth Sense system.