Motivations for disambiguating individuals include identifying inventors from patents. In addition, recording devices would have been barred from disambiguating songs in audio streams. It is necessary for disambiguating compounds from non-compound words, which use a full space. Computer scientists may write "" for this, thereby disambiguating the order of composition. Where this is a disambiguating feature, Royal Mail terms this the "dependent locality". Both involve disambiguating or tagging with words, be it with senses or parts of speech.