Horizontal Lines opens a submenu to insert a line of the specified thickness above or below the selected cell.

Interrupt Evaluation interrupts the current operation being performed by the kernel.

Kernel Configuration Options opens a dialog to add, remove, or edit kernel configurations.

Make Template inserts a template based on a selected function name.

Open opens a dialog box for opening an existing file.

MathematicaScript is an interpreter for standalone executable Mathematica scripts.

AbortProtect[expr] evaluates expr, saving any aborts until the evaluation is complete.

AbsoluteFileName["name"] gives the full absolute version of the name for a file in your filesystem.

AbsolutePointSize[d] is a graphics directive which specifies that points which follow are to be shown if possible as circular regions with absolute diameter d.

AbsoluteTiming[expr] evaluates expr, returning a list of the absolute number of seconds in real time that have elapsed, together with the result obtained.