DS stands for Dual-Screen. In DSi, the i is from 'eye', as it has cameras. Plus, i is in the form of I.
dual screen
Ds stands for "double screen'' as in the two ds screens.
dual screen seems the obvious answer. also double screen.but in 2003, Nintendo announced the release sometime in 2004 of a sucessor to the Gameboy series. In January 2004, the console was announced...