Numerator[expr] gives the numerator of expr.
Path
(Built-in Mathematica Symbol) Path is an option for Get and related functions which gives a list of directories to search in attempting to find an external file.
PolynomialRemainder[p, q, x] gives the remainder from dividing p by q, treated as polynomials in x.
RefreshRate is an option to Animate and related functions which specifies the refresh rate for frames in animations.
SeriesData[x, x_0, {a_0, a_1, ...}, n_min, n_max, den] represents a power series in the variable x about the point x_0. The a_i are the coefficients in the power series. The ...
Signature[list] gives the signature of the permutation needed to place the elements of list in canonical order.
SpellingCorrection is an option for StringMatchQ, Names, and related functions that specifies whether strings should be considered to match even when a small fraction of the ...
TextPacket[string] is a MathLink packet containing string, the text output from Mathematica as produced by functions such as Print.
TokenWords is an option for Read and related functions which gives a list of token words to be used to delimit words.
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.