> I recall a story (possibly apocryphal) of somebody who regularly exchanged a lot of e-mail with Microsoft employees and who as a result started signing their own messages with a J, figuring this was some sort of Microsoft slang. The Microsoft employees who got the J-messages scratched their heads until they were able to figure out how their correspondent arrived at this fabulous deduction.
My first name starts with a J, and we used outlook at my first company. For a while I thought the friendlier people in the company have just started shortening my name to "J / Jay".