LEGO turns 50 today by the company's own reckoning, as it's the anniversary of the patent approval for the famous little pegged bricks. They sent out some celebratory information, including this timeline of major advances in LEGO technology over the years.
I'm proud to share my birth year with the minifig. We're both turning thirty this year.
A PDF version (which actually lets you read the text) is linked below.
LEGO Timeline [pdf] [BBG]