about the wearable computer? Not because it is some dangerous new bugaboo with the potential to destroy all life on the planet with the flip of a switch, but for precisely the opposite reason: Because it is everywhere, as ubiquitous as it is invisible, capable of changing the everyday minutiae of how we go about our lives, permeating our consciousness, altering fears, desires, and ways of being. You should care because the wearable computer is at once strange and familiar; alien and domestic, a dangerous foe and your new best friend. You should care because, unlike the doomsday-opening scenario you might have been expecting, soon our lives will be dramatically changed by the wearable computer. But the world will look pretty much the same - and most of us won’t even notice.5 1.1 WEARABLE COMPUTER DEFINITION The development of a formal definition for a particular piece of technology often emerges after a customer group has used the product in an established market, and wearable computers are no exception. Generally, a wearable computer can be described as a fully functional, self-powered, self-contained computer that is worn on the body, providing access to and interaction with information anywhere and at anytime.6 Physically, the apparatus consists of a battery-powered, wearable Internet- connected computer system with a miniature eyeglass-mounted screen and the appropriate optics to form a virtual image equivalent to an ordinary desktop 5 Hal Niedzviecki Steve Mann, Cyborg: Digital Destiny and Human Possibility in the Age of the Wearable Computer (Toronto: DoubleDay Canada, 2002). 6 T. Mann Starner, S. Rhodes, B. Levine, J. Healy, J.Kirsch, D. PicardR, and Pentland, A., "Augmented Reality through Wearable Computing. Presence: Teleoperators and Virtual Environments," in Fundamentals of Wearable Computing (1997).pp. 6.