Jointer

High end or professional grade jointer-planer discernible by the integral vacuum reservoir, metal blade guard, and the very long infeed and outfeed tables. The moderately wide (4-8 inches, 10-20 centimeters) tables make it suitable for single side power planing operations.
Bench top jointer. Has shorter feed tables, though the width of this model makes it a useful short work piece surface planer.
How a jointer works. Notice the Infeed and outfeed table heights relative to the high speed rotating cutting blades.

A jointer or in some configurations, a jointer-planer (also known in the UK and Australia as a planer or surface planer, and sometimes also as a buzzer or flat top) is a woodworking machine used to produce a flat surface along a board's length. As a jointer, the machine operates on the narrow edge of boards, preparing them for use as butt joint or gluing into panels. A planer-jointer setup has the width that enables smoothing ('surface planing') and leveling the faces (widths) of boards small enough to fit the tables.