How are the different subjects in the library organized?

[Librarian (mate)] Hello. Can I help you find something?
[Student (female)] Um...I guess so. The problem is, I just transferred here from another school,
   and I’m really unfamiliar with this library. I just don’t know where anything is.
[Librarian] Oh, well I can certainly help you out with that. Are you looking for something
   specific? Or would you just like a general overview of the organization of our
   library?
[Student] Q1 Yeah...I’m actually looking for something specific I guess. I’m writing a
   research paper for my Latin American history class. So, um, I need to find some
   sources that’re related to, uh, the history of Latin America.
[Librarian] Have you worked out what you want to do for your paper...what specific topic
   you want to focus on?
[Student] Q4 Uh...no. I thought I’d come to the library and just browse the
   Latin American history section. I just, um--when I got here, I realized ! don’t
   know where that is. I don’t even know what floor to go to.
[Librarian] Well, let me tell you a little bit about how the library’s set up. Then I’ll
   show you where you can go to browse the Latin American history section.
[Student] OK, that’d be really helpful. Thanks.
[Librarian] Our university library uses the Library of Congress Classification...I don’t know
   if you’re familiar with it--maybe you’ve used the Dewey Decimal Classification
   at your local public library...or maybe you’re familiar with the Library of
   Congress Classification from your old university.
[Student] Uh, I’m not really sure. They both sound somewhat familiar, but I couldn’t tell
   you which one I used last.
[Librarian] Well, the Library of Congress Classification is organized by subject, so you
   shouldn’t have any trouble browsing the Latin American history section. All the
   information related to that will be right there in the same place.
[Student] OK, great.
[Librarian] Q2 Letters of the alphabet are used to designate the most general
   categories--which are called classes. So the call numbers on our books begin
   with a letter of the alphabet. For example, the letter A is used for general
   works, the letter H means social sciences, the letter K means law, and so on.
   Q5 You’ll be looking for the letter F--that’s the class that contains
   subject matter related to the history of the Americas.
[Student] OK. So I’m looking for books with call numbers that begin with F.
[Librarian] Right. But the history of the Americas is a pretty huge subject. You’ll
   want to look for books in the subclass of Latin America, which is designated
   by [checking something]. let’s see...yeah. It’s F1201 through F3799.
[Student] And all those books are pretty much in the same area, right?
[Librarian] Right. As you’re browsing through the subclass, you’ll see that our holdings
   are further organized by region. Um, Colombia, for example, is between
   F2251-2299. Argentina is F2801-3021.
[Student] All right. I feel a little bit more confident about navigating my way through the
   library now.
[Librarian] Good. Um, the more you use the library, the more comfortable you’ll feel
   browsing around.
[Student] Q3 Well, I have a pretty busy schedule this semester, so I’m sure you’ll see
   me back here quite often,
[Librarian] Are you a history major?
[Student] Yeah, that’s right.
[Librarian] Well, you’ll probably figure out pretty quick that the classes C, D, E, and F
   contain books about history...and after a while you’ll probably just automatically
   go over to that section when you’re looking for sources for a history paper.
[Student] OK. And where are those classes located? I mean, which floor are they on?
[Librarian] Actually, they’re on this floor. Just head down that row, all the way to the back
   wall...then take a left.
[Student] Thanks so much for your help!
[Librarian] It’s no problem. Let me know if you have any more questions.