petahopkins:
006 - special computer methods
petahopkins:
005 Computer programming, programs & data
petahopkins:
004-Data Processing
petahopkins:
008-Unassigned
petahopkins:
003 Systems
petahopkins:
002 The Book
petahopkins:
001 Knowledge
petahopkins:
012 Bibliographies of Individuals
petahopkins:
010 Bibliography
petahopkins:
009 Unassigned
petahopkins:
007 - Unassigned
petahopkins:
013 Unassigned
petahopkins:
025 Library Operations
petahopkins:
023 - Personnel Management
petahopkins:
022 - Administration of Physical Plant
petahopkins:
021 Library Relationships
petahopkins:
024- Regulations for readers (no longer used)
petahopkins:
020 Library & Information Science
petahopkins:
019 - Dictionary Catalogs
petahopkins:
018 - Catalogs arranged by author, date etc
petahopkins:
017- General Subject Catalogs
petahopkins:
016 Bibliographies of works on specific subjects
petahopkins:
015 Bibliographies of works from specific places
petahopkins:
026 - Libraries for Specific Subjects
petahopkins:
028 - Reading and Use of Other Information Media
petahopkins:
030 - General Encyclopedic Works