Amazon's Improve Your Recommendations list is a chronological record of purchases. The oldest item on my list of about 560 items is a book on Java and Corba (!) published in 1997 .
Amazon went only in 1995 and I believe I bought some books from them in 1995 or early 1996 -- so the list isn't complete. It's close though.
When I started the list we had 1 dog and no children; I worked in the early days of a startup company (Abaton.com - the domain has lapsed). Today we have 3 children, 1 (different) dog, and a fish. I work in a large publicly traded company.
Browsing the list is a strange window into the past 13 years. There were some surprises -- I bought too many (non-fiction) books I never read. I'm better about that now.
What's your list like?
 Oddly, there are three prior items listed that I'm reasonably sure we didn't order. You can skip the end of your list by editing the URL.