The Nintendo DS is a foldable handheld game console produced by Nintendo, released globally across 2004 and 2005. The DS, an initialism for “Developers’ System” or “Dual Screen”, introduced distinctive new features to handheld games: two LCD screens working in tandem (the bottom one being a touchscreen), a built-in microphone and support for wireless connectivity. Both screens are encompassed within a clamshell design similar to the Game Boy Advance SP. The Nintendo DS also features the ability for multiple DS consoles to directly interact with each other over Wi-Fi within a short range without the need to connect to an existing wireless network. Alternatively, they could interact online using the now-defunct Nintendo Wi-Fi Connection service.
All Nintendo DS models combined have sold 154.02 million units, making it the best-selling Nintendo system, the best-selling handheld game console, and the second-best-selling video game console of all time, overall, behind Sony’s PlayStation 2. The Nintendo DS was succeeded by the Nintendo 3DS in February 2011.