Tools, equipment, and paraphernalia used in caregiving can be classified according to their functions, such as for meal preparation, cleaning and washing, or taking vital signs. Tools are devices used by hand to increase speed, power and accuracy for a particular task. Equipment usually involves machines powered by electricity to provide a specific service or function and have a mechanical aspect. Paraphernalia refers to basic materials needed for an activity that must be sterilized to remove bacteria or microorganisms. Examples provided include an electric knife, ladle, food tongs, chopping board, microwave oven, food processor, coffee maker, airpot, blender, and stove.