PlotRegion is an option for graphics functions that specifies what region of the final display area a plot should fill.
PopupView[{expr_1, expr_2, ...}] represents an object which displays as a popup menu whose items are the expr_i.PopupView[{expr_1, expr_2, ...}, i] makes the i\[Null]^th ...
PrincipalValue is an option for Integrate that specifies whether the Cauchy principal value should be found for a definite integral.
SmithWatermanSimilarity[u, v] gives a number representing the Smith\[Dash]Waterman similarity between strings or vectors u and v.
SynchronousUpdating is an option for Manipulate, Dynamic, and related functions that specifies whether or not to evaluate their contents synchronously.
TraceOn
(Built-in Mathematica Symbol) TraceOn is an option for Trace and related functions which specifies when tracing should be switched on.
$BatchInput is True if input in the current session is being fed directly to the Mathematica kernel in batch mode.
As of Mathematica 8, the functionality of the Wavelet Explorer add-on has been integrated into the Mathematica kernel.
BetaPrimeDistribution[p, q] represents a beta prime distribution with shape parameters p and q. BetaPrimeDistribution[p, q, \[Beta]] represents a generalized beta prime ...
MultivariateTDistribution[\[CapitalSigma], \[Nu]] represents the multivariate Student t distribution with scale matrix \[CapitalSigma] and degrees of freedom parameter ...