SubMinus[expr] displays as expr_-.
SubPlus
(Built-in Mathematica Symbol) SubPlus[expr] displays as expr_+.
Subsuperscript[x, y, z] is an object that formats as x_y^z.
Superscript[x, y] is an object that formats as x^y.
SynchronousInitialization is an option for Manipulate, DynamicModule, and related functions that specifies whether or not to evaluate the expression given as the setting for ...
SyntaxQ
(Built-in Mathematica Symbol) SyntaxQ["string"] returns True if the string corresponds to syntactically correct input for a single Mathematica expression, and returns False otherwise.
f /: lhs =. removes any rules defined for lhs, associated with the symbol f.
TimeZone is an option for DateString, AbsoluteTime, and related functions that specifies the time zone to use for dates and times.
TotalWidth is an option which can be set for output streams to specify the maximum total number of characters of text that should be printed for each output expression. Short ...
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.