- ALL 000: Belonging to the Subject; not further Classified
- ALL 050: Newspaper and General Periodicals
- ALL 100: General Reference Works; Encyclopedias
- ALL 200: Reference of People, Institutions, Places and Events
- ALL 290: General Abbreviation Directories
- ALL 300: General Bibliographies
- ALL 350: Monograph Bibliographies
- ALL 390: Journal Directories
- ALL 440: Newspaper Directories
- ALL 690: Theses and Dissertation Directories