MousePosition[] gives the current mouse position in the notebook front end. MousePosition["coords"] gives the mouse position with respect to the specified coordinate ...
NotebookObject[fe, id] is an object that represents an open notebook in the front end.
NullWords is an option for Read and related functions which specifies whether null words should be taken to exist between repeated word separators.
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.
SawtoothWave[x] gives a sawtooth wave that varies from 0 to 1 with unit period.SawtoothWave[{min, max}, x] gives a sawtooth wave that varies from min to max with unit period.
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.