Numbers on the Post card

I have no clue, but I've been wondering the same thing since I just saw the movie a few hours ago.

Welcome to my Nightmare- Freddy Krueger

In the Library of Congress call numbers begin with a letter while in other libraries, such as a college library, they don't.

MLP's character points out that library call numbers start with letters (actually, Library of Congress numbers start with one or two letters; but many municipal libraries use the Dewey system, which is generally a decimal number followed by the Cutter number, which generally starts with the first letter of the author's name), but Frank recognizes (as he says) the number on the postcard as being in the Harvard-Yenching cataloging system (http://library.princeton.edu/libraries/EALcallnumbers.php#hy) used for cataloging Asian books. Stuck in the book with that call number is the list of people who were on the Guatemala mission with the now-vice-president, most of whom are dead. No explanation is proffered for how the late reporter got interested in the story or compiled the list.

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