Breaches: Tufts, GM/HSBC/Ralph Lauren
Infoworld reports 106,000 Tufts Alumni getting letters, and Cnet reports that “A bank tells 180,000 people who used their GM MasterCards at Polo Ralph Lauren that their data may have been stolen.” (That sounds like a strange set of circumstances. Who sorts their data by credit card issuer?)
I believe the issuer is encoded in the first 4 numbers of the card, so a numerical sort of numbers would result in a sort by issuer.