Starting in Version 7, Mathematica includes expression-to-speech functionality. In principle, any Mathematica expression can be translated in this way.
MATHEMATICA HOW TO Tutorials » Notebooks as Documents Doing Computations in Notebooks Options for Notebooks Options for Cells Two-Dimensional Expression Input Entering ...
BubbleSizes is an option to BubbleChart and related functions that specifies the range of sizes used for bubbles.
DependentVariables is an option which specifies the list of all objects that should be considered as dependent variables in equations that have been supplied.
DMSString[\[Theta]] converts an angle \[Theta] given in decimal degrees to a degrees-minutes-seconds string.DMSString[{\[Phi], \[Lambda]}] converts latitude and longitude ...
FindIndependentVertexSet[g] finds an independent vertex set of the graph g with a maximum number of vertices.
Hyperfactorial[n] gives the hyperfactorial function H(n).
ImageConvolve[image, ker] gives the convolution of image with kernel ker.
InputAutoReplacements is an option for cells and notebooks which specifies strings of characters that should be replaced immediately on input.
NeedlemanWunschSimilarity[u, v] gives a number representing the Needleman\[Dash]Wunsch similarity between strings or vectors u and v.