examples of skis 
Water skiing can be done on two skis (twin skis and jump skis) or on one ski (figures and slalom).
Single ski that is wider and shorter than a twin ski and has two bindings and no fin; it is very maneuverable and is used to perform acrobatic figures.
Rear end of the ski.
Single ski with two bindings and a tapered rounded tail; it has a long fin to provide stability during tight turns.
Device that keeps the back foot in place on the ski; it is often identical to the front binding but can also be a simple toe strap.
Device that keeps the front foot in place on the ski; it is usually shaped like a boot and made of natural or synthetic rubber.
Very sturdy skis that are longer and wider than other types of skis; they provide the stability necessary for performing jumps from a jump ramp.