This text provides an excellent quality guide of prophetic proportions, providing one-, two-, three-, four-, and five- dimensional standards for interface design. Breezy to read and offering numerous insights and a large number of useful acronyms, if this guide does not become a classic it is a mistake. More than a bridge between short periods of interface progress, this guide offers long-term extrospection on the real nature of interface---meaningful, technical, and otherwise---that is likely to occur in the next entire millenium