Nanotechnology is being used to make tiny objects (100 millionth of a millimeter or less) that can augment reality: such as contact lenses with overlays and a Braille keyboard with refreshable soft cells that will improve interaction with computers. Apple is among those developing technology to make our mobile use of AR more interactive. VR has become essential in industries such as automotive, oil and gas, to the visualization of complex processes. Accountants are using the virtual world Second Life to recruit trainees, attract clients and develop new lines of business, and holding meetings in online role-playing games such as World of Warcraft.