A Certificate of Authenticity with a Coin Set

A Certificate of Authenticity (COA) is a seal or small sticker on a proprietary computer program, t-shirt, jersey, or any other memorabilia item, especially in the world of computers and sports, which is designed to demonstrate that the item is authentic. According to a story on a January 2006 episode of "Real Sports with Bryant Gumbel", many of the items with COAs on them are actually forgeries. Computer COAs have a licence number on them, which verifies that the program is a genuine, legal copy. The terms computer program, software program, applications program, system software, or just program are used to refer to either an executable program by both lay people and computer programmers or the collection of source code from which an executable program is created (eg, compiled). ... T-Shirt A T-shirt (or tee shirt) is a shirt with short or long sleeves, a round neck, put on over the head, without pockets. ... A souvenir stall in London, England A souvenir (from French, for memory) is an object that is treasured for the memories associated with it. ... The tower of a personal computer. ... Real Sports with Bryant Gumble is a monthly magazine on HBO that started on April 2, 1995. ... Forgery is the process of making or adapting objects or documents (see false document), with the intention to deceive. ...