Underoverscript (Built-in Mathematica Symbol)

Underoverscript[x, y, z] is an object that formats as x_y^z.

Underscript (Built-in Mathematica Symbol)

Underscript[x, y] is an object that formats as UnderscriptBox[x, y].

VerifyConvergence (Built-in Mathematica Symbol)

VerifyConvergence is an option to Sum, NSum, and similar functions that specifies whether convergence checking should be done.

WindowFrame (Built-in Mathematica Symbol)

WindowFrame is a notebook option that specifies the type of frame to draw around the window in which the notebook is displayed on the screen.

WordSeparators (Built-in Mathematica Symbol)

WordSeparators is an option for Read, Find, and related functions that specifies the list of strings to be taken as delimiters for words.

XMLElement (Built-in Mathematica Symbol)

XMLElement[tag, {attr_1 -> val_1, ...}, {data_1, ...}] represents an element in symbolic XML.

$BatchOutput (Built-in Mathematica Symbol)

$BatchOutput is True if output in the current session is being sent in batch mode, suitable for reading by other programs.

$ByteOrdering (Built-in Mathematica Symbol)

$ByteOrdering gives the native ordering of bytes in binary data on your computer system.

$DateStringFormat (Built-in Mathematica Symbol)

$DateStringFormat gives the default format to use for date strings generated by DateString.

$FrontEnd (Built-in Mathematica Symbol)

$FrontEnd is a global variable that specifies to what front end object, if any, the kernel is currently connected.