Nested coordinate systems are used for the display and manipulation of multivariate data in any field including science, engineering, economics, demographics, business, and finance. A first, inner coordinate system contains a display corresponding to a subset of the variables while the other variables...http://www.google.co.uk/patents/US5524187?utm_source=gb-gplus-sharePatent US5524187 - Worlds-within-worlds nested display and interaction system and method
