Directories Libraries -- 5 Directories -- 4 Information services -- 3 Computer network resources -- 2 Internet in library reference services 2 Computer network resources, handbook,manuals,etc 1 more ... Computer-network resources -- 1 Electronic mail systems -- 1 Electronic reference services (Libraries) 1 Equipment and supplies -- 1 Evaluation 1 Facsimile transmission -- 1 Handbooks, manuals, etc 1 Information Services -- 1 Information sercives -- 1 Information services 1 Information storage and retrieval system -- 1 Internet -- 1 Internet searching 1 Learned institutions and societies -- 1 Library fitting and supplies industry -- 1 Library information network -- 1 Library services -- 1 Museums -- 1 NLG-SEA (Organization) -- 1 Reference services (Libraries) 1 Teletype -- 1 Universities and colleges -- 1 Web sites 1 less ...