What is Wolfram|Alpha?

Wolfram|Alpha is a web resource that specializes in providing data and computations on a whole range of topics. “Enter your question or calculation, and Wolfram|Alpha uses its built-in algorithms and a growing collection of data to compute the answer.”
Check out this demo, and we think you’ll agree that it’s very cool: Wolfram|Alpha demo.
Give it a try and let us know how you used it!