The video game industry involves the development, marketing, and sale of video games. It employs thousands worldwide in dozens of job disciplines. Considered a curiosity in the 1970s, the computer and video game industries have grown into mainstream markets, taking in $9.5 billion in the US in 2007, $11.7 billion in 2008, and $25.1 billion in 2010. Major companies in the industry include Japanese company Overflow, American company Accolade, British company Adventure Soft, and Filipino company Anino Games. The game industry is linked to other industries like film, through movie tie-in games, and music, through soundtracks featuring radio songs.