SingleLetterItalics is an option for Cell that specifies whether single-letter names should be displayed in italics.
Smaller
(Built-in Mathematica Symbol) Smaller is a style or option setting that specifies that objects should be smaller.
Small
(Built-in Mathematica Symbol) Small is a style or option setting that specifies that objects should be small.
SpanAdjustments is an option for selections that specifies the height and width of spanning characters.
StopScheduledTask[obj] deactivates the task obj.
StyleMenuListing is an option for cells that specifies whether a given cell style is listed in the Format \[FilledRightTriangle] Style submenu.
TabFilling is an option for character selections that specifies how a Tab character is represented on the screen.
TableSpacing is an option for TableForm and MatrixForm which specifies how many spaces should be left between each successive row or column.
WriteString[channel, expr_1, expr_2, ...] converts the expr_i to strings, and then writes them in sequence to the specified output channel.
$Context is a global variable that gives the current context.