What is the definition of Library of Congress classification?

The Library of Congress Classification (LCC) is a system used by libraries to organize and categorize books and other materials. It assigns a unique alphanumeric code to each item based on its subject matter, allowing for efficient shelving and retrieval. The LCC system divides knowledge into 21 primary classes, each represented by a letter, and further subdivides these classes into more specific topics. This classification scheme is widely adopted in academic and research libraries in the United States and beyond.