IA. Cataloging bibliographic control D. Libraries as physical collections FZ. None of these but in this section A. Theoretical and general aspects of libraries and information B. Information use and sociology of information E. Publishing and legal issues F. Management GH. Education H. Information sources HB. Gray literature HI. Electronic Media ID. Knowledge representation IE. Data and metadata structures JE. Record keeping JH. Digital preservation LJ. Software LM. Automatic text retrieval LQ. Library automation systems LR. OPAC systems LS. Search engines channels supports