--  Generalities (A-M)

                  --  Generalities (N-Z)

                  --  Archives &/or Databanks

                  --  Contacts/Networks/Referrals

                  --  Databases

                 --  Digital Libraries

                  --  Directories/Hierarchies of websites

                 --  E-journals

                  --  Forums/Newsgroups/Discussion-Mailing Lists

                  --  Gateways

                  --  Graphics/Sound/Multimedia (A-I)

                  --  Graphics/Sound/Multimedia (J-Z) 

                  --  Indexes/Bibliographical Databases (A-H)

                  --  Indexes/Bibliographical Databases (I-Z) 

                  --  Metasearch

                 --  Search Engines (A-H)

                 --  Search Engines (I-Z) 

                 --  Specialised Search Engines (A-I)

                 --  Specialised Search Engines (J-Z)

                 --  Website Reviews & Ratings