Introduction of the iMac

Steve Jobs ca. 1998, wearing a goofy button down collar with no tie, yet buttoned to the neck. His pitch for the iMac is wonderfully written, Highlighting all the best aspects of the computer. This is apparently the first Apple product to use the now-iconic, oft-copied "i" prefix. Here's some of what Jobs suggests this "i" stands for/represents:

i = internet
individual
instruct
inform
inspire

got this via Catfish Vegas.

BONUS:
The intro (the following year) of the iBook. I notice that he likes the Punnett square tables (he calls it a matrix).