Somebody asked a
question on Writers about batch-converting document reference numbers (like ISBNs but for papers, not just books) to full citations, which sounded like a "simple matter of programming web services", so I did a little poking around. I have a (single) peer-reviewed publication, so I looked up its reference number (DOI) to test with.
That's how I found out that I have two publications. Er, what? Apparently that paper ended up in a
book several years later, and apparently the process of doing that calls for neither permission from nor notification to authors. Or at least second-string authors; maybe the lead author was involved. (I wouldn't know; I haven't interacted with him in ages.) It's a paper in computational linguistics; I was just the (main) programmer, not the linguist or the PhD.