One of the principal advantages of object-oriented programming techniques over procedural programming techniques is that they enable programmers to create modules that do not need to be changed when a new type of object is added. A programmer can simply create a new object that inherits many of its features from existing objects. This makes object-oriented programs easier to modify.

To perform object-oriented programming, one needs an object-oriented programming language (OOPL). Java, C++ and Smalltalk are three of the more popular languages, and there are also object-oriented versions of Pascal.

Object Oriented Links and Resources 
Extensive collection of links to object oriented resources along with categories for distributed objects, methods and tools, languages, databases and repositories, advanced topics, and services and companies.

Object-oriented FAQ 
This document answers the most frequently asked and recurring questions that have appeared in the comp.object newsgroup. A very good starting point for those new to object oriented programming and systems.

The Object Oriented Soapbox 
Provides a comprehensive collection of links to Web resources for C++, Eiffel, Java, Smalltalk, Objective-C, Dee, and Blue methods and languages.

C++ Virtual Library
Links to information pertaining to C++ and object oriented programming. Covers documention, tutorials, newsgroups, and conference information.

Component Technology Home Page
Provides links to component-oriented and component-based software development resources on the Web.

Object-oriented methodologies - paper
Includes a brief evaluation of four of the leading object-oriented methodologies: Booch, Coad-Yourdon, Rumbaugh and Shlaer-Mellor

Python language home page
Home page for Python, an interpreted, interactive, object-oriented programming language. Visitors to this site will find information on where to download the source code, related files and documentation.

SmallTalk archive
This archive provides links to downloadable components, developer tools, applications and documents, and links to FAQs, newsgroups, and related sites.

Yahoo!'s object oriented programming page
Yahoo!'s directory of object oriented programming.

DevCentral Tutorials: C/C++
Tutorials on C, C++, and general object oriented programming.

Overview of object oriented software
Find answers to what object oriented software is by descriptions of its elements, sample code, and brief descriptions of object oriented software products.