Here is search logs of 650,000 AOL users. It's very interesting to view search history of particular person and analyze his personality. Let's do it together! Read more about AOL search database scandal or view research papers on web searching.
rho
Rho (upper case Ρ, lower case ρ) is a letter of the Greek alphabet. See Rho (letter).
Trivia about rho
Of the 24 letters of the Greek alphabet, it's the only one that ends in an English letter that none of the others does
Pi comes from the Greek alphabet where it immediately precedes this equivalent of our "R"