The Generalia Class (000–099) in the Dewey Decimal Classification (DDC) system is often referred to as the “Waste-Paper Basket Class.” This term reflects its role as a repository for miscellaneous, interdisciplinary, and hard-to-classify materials that don’t fit neatly into the other nine main classes. Just like a waste-paper basket collects various items that don’t belong elsewhere, the Generalia Class accommodates a broad range of subjects that are either too expansive, encompass multiple disciplines, or focus on the organization and communication of knowledge rather than on a specific field of study.
Many works in this class serve as general reference sources or cover topics that transcend traditional subject boundaries. For instance, a general encyclopedia like the Encyclopedia Britannica addresses subjects from science and history to literature and technology, making it challenging to categorize under a single discipline. Consequently, it is classified under 030 (Encyclopedias and Books of Facts). Likewise, books on library and information science (020), journalism and publishing (070), and computer science (004–006) are included in the 000 class because they deal with the creation, organization, storage, and dissemination of information rather than focusing on a specific subject area.
The term “Waste-Paper Basket Class” should not be viewed negatively. It does not suggest that the materials are unimportant or of lesser value. Instead, it underscores the unique function of the 000 class as a flexible category for works that are general, multidisciplinary, or emergent in nature. For example, when computer science first emerged as an academic discipline, it was classified in the 000 class due to its close relation to information processing, which did not align neatly with traditional subject divisions of the DDC.
Therefore, the Generalia Class is called the “Waste-Paper Basket Class” because it collects and organizes a variety of subjects and resources that cannot be easily categorized elsewhere. This flexibility makes the 000 class a vital component of the DDC system, ensuring that general and interdisciplinary knowledge remains accessible and systematically organized in libraries.
