Are they psychic?

It's pretty impressive how online merchants can pinpoint the sort of things you're interested in. Take, for example, these two emails I got from Amazon.com.

March 9:
Subject: Your Amazon.com order of "Canon EF 50mm f/1.8 II Camera Lens" has shipped!
March 11:
Subject: Amazon.com recommends "Canon EF 50mm f/1.8 II Camera Lens" and more

Comments

qs said…
Machine algorithms predicting your wants. Haven't you seen the terminator movie Zeke. The moral is DON'T TRUST THE MACHINES.