$MachineAddresses gives a list of strings specifying the current IP addresses associated with the computer on which Mathematica is being run.

AbsoluteThickness[d] is a graphics directive which specifies that lines which follow are to be drawn with absolute thickness d.

GridLinesStyle is an option for 2D graphics functions that specifies how grid lines should be rendered.

AbsoluteDashing[{d_1, d_2, ...}] is a graphics directive which specifies that lines which follow are to be drawn dashed, with successive segments having absolute lengths d_1, ...

ParagraphIndent is an option for Cell which specifies how far in printer's points to indent the first line of each paragraph of text.

Explicit representations of newlines and tabs in strings. This prints on two lines. In InputForm there is an explicit ∖n to represent the newline.

ImageLines[image] finds line segments in image and returns the coordinates of their endpoints.ImageLines[image, t] uses the threshold t for selecting image ...

PageFooterLines is an option for notebooks that specifies whether a horizontal line is inserted at the bottom of each page when the notebook is printed.

PageHeaderLines is an option for notebooks that specifies whether a horizontal line is inserted at the top of each page when the notebook is printed.

PageWidth is an option for output streams and for cells which specifies how wide each line of text should be allowed to be.