MLUserFunction is a MathLink type that describes a function pointer to a function taking an MLINK argument with a return type of void.
NumberSigns is an option for NumberForm and related functions which gives strings to use as signs for negative and positive numbers.
PearsonDistribution[a_1, a_0, b_2, b_1, b_0] represents a distribution of the Pearson family with parameters a_1, a_0, b_2, b_1, and b_0.PearsonDistribution[type, a_1, a_0, ...
ArcSech
(Built-in Mathematica Symbol) ArcSech[z] gives the inverse hyperbolic secant sech -1 (z) of the complex number z.
EvaluationCompletionAction is an option for notebooks that specifies the action taken when an evaluation is completed.
UnitVector[k] gives the two-dimensional unit vector in the k\[Null]^th direction.UnitVector[n, k] gives the n-dimensional unit vector in the k\[Null]^th direction.
Sign
(Built-in Mathematica Symbol) Sign[x] gives -1, 0, or 1 depending on whether x is negative, zero, or positive.
Byte
(Built-in Mathematica Symbol) Byte represents a single byte of data in Read.
Except
(Built-in Mathematica Symbol) Except[c] is a pattern object which represents any expression except one that matches c. Except[c, p] represents any expression that matches p but not c.
ByteCount[expr] gives the number of bytes used internally by Mathematica to store expr.