Object Oriented Programming in C - Paul Field's fine, clear paper, published in C Vu 4:1 (November 1991), on how to use an object-like discipline with a procedural language. - http://www.accu.informika.ru/acornsig/public/articles/oop_c.html
Object-Oriented Programming - Growing article, with links to many related topics. [Wikipedia] - http://en.wikipedia.org/wiki/Object-oriented_programming
Object Oriented FAQ: Object FAQ - The most comprehensive resource on object technology anywhere. - http://www.objectfaq.com/oofaq2/
OOP 2005 Conference - (January 2005) presents object-based solutions in an expansive and fully comprehensive forum for users, experts and leading vendors. - http://www.sigs-datacom.de/sd/kongresse/oop_2005/index.htm
What is Object-Oriented Programming? - Definition, lists some links for more information. [Webopedia] - http://webopedia.com/TERM/o/object_oriented_programming_OOP.html
Planet Source Code - Lets OOP programmers submit code for review by other programmers; many source code samples to help educate beginners on many concepts; contests where programmers vote for the most efficient, useful code recently submitted. - http://www.planet-source-code.com/
The Object-Oriented Page - Large, well researched list of OO issues, languages, projects, and links. Excellent resource. - http://www.well.com/user/ritchie/oo.html
Cetus Links: Languages - Over 11,000 links on objects and components. - http://www.cetus-links.org/top_languages.html