Swiss Army Knives have been around since the late 19th century and are known for their versatility and convenience. They are multi-functional tools that contain a variety of blades, tools, and other features such as scissors, bottle openers, and screwdrivers. The term 'USES' is an acronym for the various functions that these knives can perform, which include Utility, Survival, Eating, and Self-defense. Swiss Army Knives are popular among campers, hikers, and other outdoor enthusiasts due to their compact size and wide range of USES.