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History and trajectory of Mathematica

Today's Wolfram Alpha Blog is the first in a series of videos and transcripts from Stephen Wolfram's keynote address at the International Mathematica User Conference 2009. From the Wolfram Blog entry:

Future Mathematica features, new directions for Wolfram|Alpha, and how the two Wolfram technologies will be integrated were highlights of Stephen Wolfram’s keynote address at the International Mathematica User Conference 2009.

This first video gives a quick history of Mathematica from its roots going back to 1981. I'm looking forward to hints about future features.

Disclosure: Wolfram Research gave me a review copy of Mathematica.