The fictional language Klingon, from Star Trek, has a surprisingly large and dedicated following, with its own dictionaries, language learning materials, and even opera performances.
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The fighting game *Street Fighter II* popularized the six-button layout (light/medium/hard punches and kicks) which is still a standard today.
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Classical composers often didn't write their own parts for instruments like the timpani (kettledrums) or bassoon; those were usually left to the discretion of the performers or their assistants.
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