Tolerance is an option for various numerical options which specifies the tolerance that should be allowed in computing results.

ToLowerCase[string] yields a string in which all letters have been converted to lowercase.

TooltipDelay is an option for objects such as Tooltip that specifies how long to delay after the mouse is over the object before displaying the tooltip.

Top is a symbol that represents the top for purposes of alignment and positioning.

ToRadicals[expr] attempts to express all Root objects in expr in terms of radicals.

Total[list] gives the total of the elements in list. Total[list, n] totals all elements down to level n. Total[list, {n}] totals elements at level n. Total[list, {n_1, n_2}] ...

TotalVariationFilter[image] iteratively reduces noise while preserving edges in image.TotalVariationFilter[image, param] assumes a regularization parameter value param.

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 ...

ToUpperCase[string] yields a string in which all letters have been converted to uppercase.

TraceDepth is an option for Trace and related functions which specifies the maximum nesting of evaluation chains that are to be included.