Protected is an attribute which prevents any values associated with a symbol from being modified.
Put
(Built-in Mathematica Symbol) expr >> filename writes expr to a file. Put[expr_1, expr_2, ..., " filename"] writes a sequence of expressions expr_i to a file. Put["filename "] creates an empty file with ...
RealBlockDiagonalForm is an option for SchurDecomposition and related functions which specifies whether 2*2 blocks of real values should be used on matrix diagonals in place ...
RemoveProperty[{obj, item}] removes all properties associated with item in obj.RemoveProperty[{obj, item}, name] removes the property name associated with item in obj.
RevolutionAxis is an option for RevolutionPlot3D which specifies the revolution axis around which the curve should be rotated.
SectorSpacing is an option to PieChart and related functions that specifies radial spacing of sectors.
SplineDegree is an option for spline functions and graphics primitives that specifies the degree of polynomial basis to use.
SymbolName[symbol] gives the name of the specified symbol.
TableAlignments is an option for TableForm and MatrixForm which specifies how entries in each dimension should be aligned.
TableDepth is an option for TableForm and MatrixForm which specifies the maximum number of levels to be printed in tabular or matrix format.