- There exists a Library of Congress subject heading for "roller disco." Unsurprisingly, when I searched WorldCat for it, eight of the ten results were first published between 1979 and 1981.
- You can also catalog works on roller disco using a combination of the subject headings "Roller skating" and "Disco dancing."
- There's an entire MARC fixed field devoted to identifying whether or not the item being cataloged is a festschrift. No doubt that made sense at the time, but even our professor finds it hilarious.
- If I ever publish a book and put "Ph.D." after my name (which I'd never do, because it's obnoxious), the "Ph.D." part wouldn't appear in the MARC record for the book. But if I move to England, become a British subject, get named Dame Commander or Baroness of Whatsit, and then publish a book, I'd get to be Dame or Baroness in library catalogs ever after. (Why? Well, they don't call them the Anglo-American Cataloging Rules for nothing.)
- Steve Lawson at See Also... created an LCSH fiction quiz: guess the novel by its subject headings. I always did wonder how on earth you'd create subject headings for #1. (I didn't learn this in class, but I thought I'd link it anyway.)
- I'm still gaping at the fact that people actually wrote entire books about roller disco. Even in 1979.
If you like this kind of thing, I recommend the Wacky and Weird Subject Headings Wiki. Personally, I'm delighted that someone at the Library of Congress decided that "Names carved on trees" merits its very own subject heading.