InputAssumptions is an option for WolframAlpha that specifies assumptions for current query input.
LinebreakAdjustments is an option for selections that sets parameters used for calculating where automatic line breaks should be inserted.
PhaseMargins[sys] gives the phase margins of a linear time-invariant system sys.
PrivateEvaluationOptions -> {opt_1 -> val_1, opt_2 -> val_2} is an option for selections that specifies settings for evaluation-related suboptions.
PrivateFontOptions -> {opt_1 -> val_1, opt_2 -> val_2, ...} is an option for selections that specifies settings for various font suboptions.
expr //. rules repeatedly performs replacements until expr no longer changes.
SequenceHold is an attribute that specifies that Sequence objects appearing in the arguments of a function should not automatically be flattened out.
SpellingOptions -> {opt_1 -> val_1, opt_2 -> val_2, ...} is an option for notebooks that specifies settings for spell checking.
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.
ToContinuousTimeModel[sys] gives the continuous-time approximation of the discrete-time TransferFunctionModel or StateSpaceModel object sys.ToContinuousTimeModel[tf, s] gives ...