MultilineFunction is an option for UnderscriptBox and related box objects that specifies what to do when the contents of a box object are too long to fit on one line.
Prepend
(Built-in Mathematica Symbol) Prepend[expr, elem] gives expr with elem prepended.
RadicalBox[x, n] is a low-level box construct that represents the displayed object Power[x, (n)^-1] in notebook expressions.
Rationals represents the domain of rational numbers, as in x \[Element] Rationals.
SetFileDate["file"] sets the modification and access dates for a file to be the current date.
SyntaxForm is an option for InterpretationBox and TagBox objects that specifies the precedence level to use when the InterpretationBox or TagBox is considered as an operator.
Here is an expression in full form. TreeForm prints out expressions to show their "tree" structure. You can think of any Mathematica expression as a tree. In the expression ...
VCS
(Mathematica Import/Export Format) MIME types: text/calendar VCS vCalendar format. Used for the storage and exchange of calendar information and in personal information management applications. Superseded by ...
Complex
(Built-in Mathematica Symbol) Complex is the head used for complex numbers.
ObservabilityGramian[ss] gives the observability Gramian of the StateSpaceModel object ss.