Listening to @karaswisher from last week talking about the need for phones in an emergency … one of her guests talks about using a pay phone with a calling card. Just like that, 867 143 7081 3892 popped into my head. My AT&T calling card number for decades at IBM. Etched forever into my brain. Just like the ISBN for Lee Iacoca’s autobiography in hardcover, both editions. (Explained below) What number is stuck in your brain?