Following an impressive first-quarter earnings report, shares in Alphabet are up big.There are only seven companies in the world with a market capitalization of at least $1 trillion. Among these businesses, only Microsoft, Apple, Nvidia, and Alphabet (GOOG 1.06%) (GOOGL 1.08%) have reached an even more exclusive club.No, I'm not talking about gaining access to the "Magnificent Seven" -- although each of those companies is in that club, too. All four of these tech giants have a market cap of at least $2 tril ...