What Does "DSi" Stand For? "DS Improved"—Features Over the DS Lite

The "DSi" in Nintendo DSi stands for "DS improved".

Enhancements over the DS Lite:

• Better screens: Higher resolution, brighter.
• Dual cameras: Front & rear for photos/video.
• SD card slot: Storage for games, photos, data.
• Improved audio: Better speakers + microphone.
• DSi Shop: Digital game/app downloads.