A bootleg is an unauthorized edition, which can be as much music as books, video games, television series or movies. In the case of videogames and anime, this phenomenon is widespread, and normally consists of the production of articles that,  without being official, try to pass themselves off as such. Bootleg production in this case is an activity that occurs predominantly in countries such as Singapore, Hong Kong and Taiwan. Etymologically, bootleg (in English, contraband) means the leg of the boot, which refers to the tradition of hiding the bottle of illegal liquor in the boot. In musical terms, a bootleg is a recording that has not been officially released by the artist or their record company. They can be live recordings of concerts, studio sessions, rehearsals or simply jams (musical improvisations). The source of these recordings are usually CDs offered for sale by companies dedicated to the trade in these recordings, analogue audio tapes or CD-Rs obtained directly during the concerts by people who came to them with portable home recorders, or tapes or CD- R that left the recording studio in a dubious manner, without the knowledge of the artist or record company. The people who make such pirated recordings are called bootlegers. We can also find videos that can be collected on video tapes or in the currently used format of DVDs.