No 6. A touch-screen to change it all

In this presentation (in 2006), Jeff Han shows off a cheap, scalable multi-touch and pressure-sensitive computer screen interface that may change the computer interaction phenomenon as we know it.

[youtube]http://www.youtube.com/watch?v=-owCyZ8cnb0[/youtube]

No 5. A little MathMagic

Mathemagician Arthur Benjamin races against a team of calculators to figure out 3-digit squares, solves another massive mental equation and guesses a few birthdays. To find out how, watch the video below.

[youtube]http://www.youtube.com/watch?v=M4vqr3_ROIk[/youtube]