Metaobject Protocol
- Information page on the original Wiki, at (Ward) Cunningham & Cunningham, Inc.
- http://www.c2.com/cgi/wiki?MetaObjectProtocol

Gregor Kiczales's Page
- Coauthor of book: The Art of the Metaobject Protocol. Leading researcher of Aspect-Oriented Programming. Professor, computer science department, University of British Columbia.
- http://www.cs.ubc.ca/~gregor/

Metaobject
- Growing article, with links to many related topics. Wikipedia.
- http://en.wikipedia.org/wiki/Metaobject

OpenJava
- Extensible language based on Java. A Metaobject Protocol (MOP) is the extension interface; lets programmers customize language to implement new language features, mechanisms.
- http://www.csg.is.titech.ac.jp/openjava/