Talk about your "you must be fun at parties"; and this isn't necessarily directed at you, floatingatoll, but when I see comments like this I often wonder if it's a case of "memorizes USPS shipping rules for fun" or more likely "worked on a contract once where we had to codify USPS shipping rules into an application, so I don't have them memorized but sure as hell know where to look".

For example, I've written code for computers to consume for the vast majority of my career. But go ahead and ask me the finer points of cellophane manufacturing...please, I've been waiting years for it to come up in conversation.