The document compares and contrasts augmented reality and virtual reality. Augmented reality overlays digital information and graphics onto the real world using devices like mobile phones or glasses. It allows users to see real environments with additional virtual elements. In contrast, virtual reality fully immerses users in simulated, computer-generated worlds and makes them feel like they are experiencing realistic scenes and objects. It uses headsets or helmets to display simulated environments and may include additional input devices like gloves for interaction.