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Object-oriented Programming

Lisp has the most powerful, comprehensive, and pervasively object-oriented extensions of any language. CLOS embodies features not found in any other object-oriented language. These include the following:

• Multiple inheritance
• Generic functions including multi-methods
• First-class classes
• First-class generic functions
• Metaclasses
• Method combination
• Initialization protocols
• Metaobject protocol
• Integration with Lisp types

It is likely that Common Lisp (with CLOS) will be the first standardized object-oriented programming language.