<P> Most of the time, the edited version will only edit the content which is absolutely necessary, in order to be as identical to the explicit counterpart as possible . However, some edited albums, such as Halfway Between the Gutter and the Stars ("Star 69") and Curtain Call: The Hits (first 2 tracks) will have tracks removed completely, while others, such as Take Off Your Pants and Jacket ("Happy Holidays You Bastards" renamed "Happy Holidays") and The Slim Shady LP (4 tracks were renamed) will remove objectionable content from song titles . The edited version of Life After Death is notable for having so many tracks omitted that it was able to be condensed to one disc in spite of being a double album . </P> <P> The edited version of an album will normally edit to the level in which the content would be considered appropriate for radio airplay . Strong language is almost always edited out (however the edited versions of The Marshall Mathers LP and The Slim Shady LP left in nearly all profanities other than "fuck", with the exception of the album's singles in which the existing radio edits were used), in addition to racial slurs (most albums will remove "nigga / nigger"). Specific drug references are also usually edited out, primarily slang terms for illegal drugs . Generally, however, some edited albums are not consistent with editing violent and sexual lyrics, as often, these lyrics are left in unedited . An example is "Tomb of the Boom" on the edited version of Speakerboxxx / The Love Below, which leaves in detailed lyrics about street violence (including sound effects of gunfire and police sirens) and sexual innuendos, both of which would normally be edited out, but on the other hand, all obscenities are muted . </P>

When were picture symbols first used as a consistent language system