A discipline within architecture, deals with signage, maps, orientation ... but is a lot more than just that. Originally from architecture as in the BuiltEnvironment, it's also now relevant for the OnlineEnvironment

Some links to get started

* [http://www.hypertextnavigation.com/infoaxcs.htm Enabling Extremely Rapid Navigation in Your Web or Document]
* [http://www.hitl.washington.edu/publications/satalich/home.html  Navigation and Wayfinding in Virtual Reality: Finding Proper Tools and Cues to Enhance Navigation Awareness]
* [http://www.scope.gmd.de/info/www6/technical/paper180/paper180.html Usability Studies And Designing Navigational Aids For The World Wide Web]
* [http://www.libfind.unl.edu/casetudy/456/sharon.htm Wayfinding: Human Perceptions & Orientation; in the Built Environment]
* [http://www.seas.gwu.edu/faculty/sibert/darken/publications/Wayfinding_CHI95/wayfinding.html Wayfinding in Large-Scale Virtual Worlds]
* [http://www.acm.org/sigchi/chi96/proceedings/papers/Darken/Rpd_txt.htm Wayfinding Strategies and Behaviors in Large Virtual Worlds]