InputPacket[] is a MathLink packet that indicates a prompt for input as generated by Input.
LinearOffsetFunction is an option for linear and generalized linear model fitting functions that specifies a component for the model that is to be assumed known.
Medium
(Built-in Mathematica Symbol) Medium is a style or option setting that specifies that objects should be medium sized.
MenuCommandKey is an option for cells that specifies the keyboard shortcut to be associated with a style listed in the Format \[FilledRightTriangle] Style submenu.
MenuPacket[integer, string] is a MathLink packet indicating a menu request with title string.
OutputAutoOverwrite is an option for notebooks that specifies whether the output of a command should replace any existing output from a previous evaluation.
PrintPrecision is an option for selections that specifies the maximum number of digits used for displaying a machine-precision number.
TextPacket[string] is a MathLink packet containing string, the text output from Mathematica as produced by functions such as Print.
TraditionalFunctionNotation is an option for selections that specifies whether input of the form f(x) is interpreted by the kernel as a function or as a product.
Whitespace represents a sequence of whitespace characters in StringExpression.