000 - Generalities

• American Library Association has links to many different sites

010 - Bibliography

020 - Library science

030 - General encyclopedic works

040 -

050 - General serial publications

060 - General organizations and museums

070 - News Media

080 - General collections

• Discovery Channel School has 3 different paths, one for students, one for parents and one for teachers

090 - Manuscripts & rare books