I have no idea who the AARP is but I'm assuming it's pensioners, and as such they shouldn't be on that magic internet thingy anyways.
AARP stands for American Association of Retired Persons. Basically, and this information comes from wikipedia, the AARP is a non-governmental, non-profit, non-partisan interest and lobbying group which addresses issues affecting older humans. As I am older than 50, I get letters all the time from them, asking me to join, which I have yet to do.