Nintendo DS has two screens. The lower screen is a touch screen with a built-in microphone.
It is not known for sure what the 'DS' stands for in Nintendo DS. Some think 'DS' is short for 'Dual Screen,' while others believe 'DS' stands for 'Developer's System.'
Nintendo DS is Nintendo's first portable console to use stereo speakers.
While in production, Nintendo gave Nintendo DS the code name, 'Project Nitro.'
