Object-Oriented

Cetus
Link collection with FAQs, newsgroups, books, and conferences.
http://www.cetus-links.org/oo_data_bases.html

Object Data Management Group (ODMG)
Industry association for a common OO data standard. Extracts of ODMG 3.0 as well as some explaining articles are online. Note: Standard is partially superseded by JDO.
http://www.odmg.org/

ODBMS Articles and Products
Articles on object-oriented database systems architecture and technology, product comparison and selection as well as a small FAQ.
http://www.service-architecture.com/object-oriented-databases

Ultima-S: Problems and Decisions
Advantages of a client-server O(R)DBMS versus a mainframe database are shown.
http://ivn73.tripod.com/ultima.htm

Whatever Happened to Object-Oriented Databases?
Comparison of state and future prospect of object-oriented and relational databases. [PDF file with IEEE Computer version available from same site.]
http://www.leavcom.com/db_08_00.htm