SynchronousInitialization is an option for Manipulate, DynamicModule, and related functions that specifies whether or not to evaluate the expression given as the setting for ...
SystemsModelLabels is an option to StateSpaceModel and TransferFunctionModel that specifies labels of the variables.
SystemsModelOrder[ss] gives the order of the StateSpaceModel object ss.
TableDirections is an option for TableForm and MatrixForm which specifies whether successive dimensions should be arranged as rows or columns.
Thread
(Built-in Mathematica Symbol) Thread[f[args]] "threads" f over any lists that appear in args. Thread[f[args], h] threads f over any objects with head h that appear in args. Thread[f[args], h, n] threads f ...
Tooltip
(Built-in Mathematica Symbol) Tooltip[expr, label] displays label as a tooltip while the mouse pointer is in the area where expr is displayed.
TraceOriginal is an option for Trace and related functions which specifies whether to test the form of each expression before its head and arguments are evaluated.
Unitize
(Built-in Mathematica Symbol) Unitize[x] gives 0 when x is zero, and 1 when x has any other numerical value.
Variables[poly] gives a list of all independent variables in a polynomial.
VertexOutDegree[g] gives the list of vertex out-degrees for all vertices in the graph g.VertexOutDegree[g, v] gives the vertex out-degree for the vertex v.