Casio
Casio has quality standards designed to ensure that products can be used in all kinds of situations, and the company performs repeated stringent testing through product prototyping. For example, Casio electronic dictionaries are subjected to a pressure test, where a load is placed on the dictionary unit, and robustness is verified from the top-down direction. Only those prototypes that meet all the quality criteria for the product concerned can move on to the factory production process. These criteria include resistance to vibration, dropping, dust, salt water, UV light, and static electricity, as well as extremes of temperature and humidity.