Why Is the Nintendo DS Called "DS"?

"DS" = "Dual Screen."

The system's defining feature is two screens:

• Top screen: Main gameplay display (non-touch).
• Bottom screen: Resistive touchscreen for direct input (stylus/finger).

This dual-screen design enabled new genres—touch puzzles, dual-perspective gameplay, map/inventory offloading—and defined Nintendo's handheld line through the 3DS family.

Early internal codename: "Nitro" (seen on FCC ID, boot ROM).