16 2.4. Role of international groups 20 2.5. Role of conferences and meetings on documentation 22 3. Current operations and proposed activities 25 3.1. Background 25 3.2. Current activities in Federal agencies 25 3.3. Traditional cooperative activities 26 3.4. Dissemination and publication of secondary sources 27 3.4.1. Listings of monographic publications-27 3.4.2. Listings of periodicals and periodical articles 29 3.4.3. Listings of reports of Government agencies 29 3.4.4. Abstracting and indexing services and publications 32 3.4.5. Clearinghouses 39 3.4.6. Copyright and translation problems 42 3.5. Acquisition and exchange of publications 45 3.5.1. Interlibrary loans 46 3.5.2. The Farmington and other exchange plans 47 3.5.3. Photo duplication services 49 3.5.4. Depository libraries 50 3.5.5. Cooperative exchange of data 50 3.6. Analysis and identification 51 3.6.1. Physical identification-descriptive cataloging 51 3.6.2. Content identification-subject cataloging 54 Page 3. Current operations and proposed activities-Con. 3.6. Analysis and identification--Continued 3.6.3. Cooperative and centralized cataloging 60 3.6.4. Cataloging rules and guidelines 61 3.6.5. Use of machines for description and identification 63 3.7. Systematization and terminology control.. 66 3.7.1. Thesauri 67 3.7.2. Classification schemes 72 3.7.3. Interchange of indexing languages 77 3.8. Storage, search, and selective dissemination. 84 3.9. Standardization 86 3.9.1. Programs of Federal Government agencies 87 3.9.2. Programs of the American Standards Association (ASA) 114 4.3.4. Character sets for machine processing 116 4.3.5.