WolframAlpha

[CTS_AE]

-Computable Knowledge Engine-
http://www.wolframalpha.com/

I find this engine best for math help/calculus
not to mention it's a pretty awesome system like how you can add fruits and what not together or find the lethal dosage rate for substances, which I dont understand but my friend explained it to me some.

It's a great system I just dont know if it can keep up to the data/knowledge expansion of the human race.
There's just simply things it doesn't know/have knowledge of.
I'm not sure if it relies on gathering data itself or if it's most all manual.
I'm sure parsing the data would be a bytch but it seems like it could be do-able, as well if a human over checked what it wanted to add.
Which then it could ideally be ran off of a less public/strict wiki system or some kinda of thumbs wiki system which would have the public say if the information is "correct".
Darwinism for data