vices-stationary units that feature an array of sensors, cameras, and micro- phones-will gather and transmit audio, video, and data information to users anywhere in the world. E21s will also allow users to access various types of information and communications resources and to control the local environ- ment. Users will be able to communicate naturally in the spaces created by E21s, via speech and vision interfaces, without relying on any particular point of interaction (such as a PC or telephone). Unlimited by size, weight, power, or wireless connections, E21s will provide far more computational power than H21s. Oxygen's researchers believe the extra power will pay big dividends in terms of speech and facial recognition and other types of natural user interactions. Additionally, H21 users will be able to connect to a nearby E21 to access the device's abundant computational power. 2.6.4 Applications Potentially equal to Project Oxygen's information and communications access capabilities are the ways this system will allow people to use information. Oxygen's applications promise to create a world where information flows as freely as water. An obvious use of Oxygen's natural interface, communication, and control capabilities will be home and workplace automation. Users will be able to ver- bally create command sequences for controlling devices such as lights, doors, and heating and cooling systems. Want to raise the volume on your TV? It could be as simple as shouting, "Louder, please." Want to turn on your office coffee maker while you're driving into work? Simply bark the command into your H21. Given Oxygen's anytime, anyplace audio/video delivery capabilities, home and workplace monitoring should be a snap. Anxious parents will be able to surreptitiously monitor a baby-sitter via their H21 while sitting in a movie theater or riding in a car. A boss could snoop on workers while sitting in his or her office or while attending a meeting in another country. Factory workers could monitor critical meters and gauges wi