But I would like to really **** him off by reiterating that as far as I'm concerned, there is not a single thing that indians have contributed that I feel I couldn't live without. Nothing.
Now, if they had had the brains to invent the wheel, or even writing, I might reconsider...
Quite a number of writing systems were developed in MesoAmerica.
Some believe the quipu systems of the Andean Indians constituted a sort of "digital" data entry.