DeleteFile["file"] deletes a file. DeleteFile[{"file_1", "file_2", ...}] deletes a list of files.
FullGraphics[g] takes a graphics object, and generates a new one in which objects specified by graphics options are given as explicit lists of graphics primitives.
ListDeconvolve[ker, list] gives a deconvolution of list using kernel ker.
ObservabilityGramian[ss] gives the observability Gramian of the StateSpaceModel object ss.
OutputStream["name", n] is an object that represents an output stream for functions such as Write.
RenameFile["file_1", "file_2"] renames file_1 to file_2.
Visible
(Built-in Mathematica Symbol) Visible is a notebook option which specifies whether the notebook should be explicitly displayed on the screen.
$SyntaxHandler is a global variable which, if set, is applied to any input string that is found to contain a syntax error.
ParametricPlot3D[{f_x, f_y, f_z}, {u, u_min, u_max}] produces a three-dimensional space curve parametrized by a variable u which runs from u_min to u_max. ...
GraphicsGrid[{{g_11, g_12, ...}, ...}] generates a graphic in which the g_ij are laid out in a two-dimensional grid.