Ordering[list] gives the positions in list at which each successive element of Sort[list] appears. Ordering[list, n] gives the positions in list at which the first n elements ...
Overlay
(Built-in Mathematica Symbol) Overlay[{expr_1, expr_2, ...}] displays as an overlay of all the expr_i.Overlay[{expr_1, expr_2, ...}, {i, j, ...}] displays as an overlay of expr_i, expr_j, ...
ParallelTable[expr, {i_max}] generates in parallel a list of i_max copies of expr.ParallelTable[expr, {i, i_max}] generates in parallel a list of the values of expr when i ...
PasteButton[expr] represents a button that pastes expr whenever it is pressed. PasteButton[label, expr] displays with label on the button.
Permutations[list] generates a list of all possible permutations of the elements in list. Permutations[list, n] gives all permutations containing at most n ...
Plus
(Built-in Mathematica Symbol) x + y + z represents a sum of terms.
Position[expr, pattern] gives a list of the positions at which objects matching pattern appear in expr. Position[expr, pattern, levelspec] finds only objects that appear on ...
Read
(Built-in Mathematica Symbol) Read[stream] reads one expression from an input stream and returns the expression. Read[stream, type] reads one object of the specified type. Read[stream, {type_1, type_2, ...
ReliefPlot[array] generates a relief plot of an array of height values.
SpheroidalPS[n, m, \[Gamma], z] gives the angular spheroidal function PS n, m (\[Gamma], z) of the first kind.