The Cerritos Library in Cerritos, CA does not use the Dewey Decimal System. What system does it use and why?
They use the Library of Congress classification system
Yep, they use LCC. As for why, I suppose you could call them and ask. Phone numbers are at the bottom-left corner.
Go ahead. Call 'em. They’re librarians. They like to answer questions. 
What is it lately with library classification questions? I’m an actual librarian and I haven’t encountered so many questions about it in an actual library as I have on here lately.