The Wayback Machine - https://web.archive.org/web/20140209070859/http://www.wolfram.com/technology/guide/
Mathematica 9 is now available
Technology Guide--The Technology Inside Matters

Mathematica incorporates a wide range of unique and innovative technologies--consistently out-delivering other systems for reliability, time-to-result, and scope. Browse the guide to find out how.

Compute & Visualize: Key Technologies
Combinatorial optimization
Combinatorial optimization
Constrained nonlinear optimization
Constrained nonlinear optimization
Dynamic type switching (DTS)
Dynamic type switching (DTS)
Event detection and event localization
Event detection and event localization
High-level string computation
High-level string computation
Integrated geometric computing
Integrated geometric computing
Interior point method
Interior point method
Interpolating objects
Interpolating objects
Load-on-demand curated data
Load-on-demand curated data
Piecewise functions
Piecewise functions
Selective method override
Selective method override
Significance arithmetic
Significance arithmetic
Symbolic sound support
Symbolic sound support
Symbolic statistical computing
Symbolic statistical computing
Symbolically enhanced numeric computing
Symbolically enhanced numeric computing
Task-oriented superfunctions (TOSF)
Task-oriented superfunctions (TOSF)
Next: Develop