OwnValues[x] gives the rule corresponding to any ownvalue defined for the symbol x.
PropertyValue[{obj, item}, name] gives the property value associated with name for item in obj.
Protected is an attribute which prevents any values associated with a symbol from being modified.
Quit
(Built-in Mathematica Symbol) Quit[] terminates a Mathematica kernel session.
ResetScheduledTask[obj] resets scheduled task object obj to the original parameter values.ResetScheduledTask[obj, timespec] resets scheduled task timing to ...
RevolutionAxis is an option for RevolutionPlot3D which specifies the revolution axis around which the curve should be rotated.
SamplingPeriod is an option that specifies the sampling period of control system models.
SpanFromBoth is a symbol that can appear at a particular position in a Grid or related construct to indicate that the corresponding position is occupied by a spanning element ...
SpheroidalRadialFactor[n, m, c] gives the spheroidal radial factor with degree n and order m.
TableHeadings is an option for TableForm and MatrixForm which gives the labels to be printed for entries in each dimension of a table or matrix.