part of any uniform, including school uniforms, which in the UK usually still feature the school's badge in cloth on the breast pocket of the jacket or blazer. Various uses One of the best-known badges is the typically star-shaped U.S. sheriff's badge, made famous in Westerns. The Chairman Mao badge is probably the most famous political badge. Members of fraternities and sororities often refer to the pins that signify their membership as badges. The BBC children's programme Blue Peter also awards its own "Blue Peter badge" to members of the public who appear on the show. These are highly collectable as they cannot be bought—except from people who have been awarded one and wish to sell it. Case badges are thick, about deep, lucite stickers that are often packaged with various computer parts, such as processors and video cards. Modern computer cases are frequently embellished with an indentation on the case's front panel to facilitate the affixing of a case badge. Button badges are a highly collectible round badge with a plastic coating over a design or image. They often have a metal pin back or a safety pin style back. The most popular size is but the badges can range anywhere from this size right up to badges. This style of badge is used in political campaigning and often given as part of a birthday greeting such as a birthday card. In the United States, the badges used by law enforcement, fire, and security guards are usually made of metal in various colors and finishes and are worn above the left chest pocket on the uniform shirt or jacket. Detectives and other plainclothes personnel may wear them on a belt holder, or on a chain around the neck. Shapes are manifold, with municipal police departments tending to have some variation of a shield shape, and sheriff's departments usually going with a 5, 6, or 7 point star shape. In most cases, an enameled seal of the organization, city, county, or company can be found in the center of the badge. In computing, badges are used to demonstrate skills. In education, digital badges are used as alternative forms of credentials, similar to those being used in the MacArthur Foundation's Badges for Lifelong Learning initiative. In Japan, lawyers are often issued lapel pin badges which serve as an identification tool in court, or during their normal course of work. Since lawyers