The Delphi language is a set of object-oriented extensions to standard Pascal. Object-oriented programming is an extension of structured programming that emphasizes code reuse and encapsulation of data with functionality. Once you define a class, you and other programmers can use it in different applications, thus reducing development time and increasing productivity. 

The following topics provide a brief introduction to object-oriented concepts for programmers who are just starting out with the Delphi language. For more details on object-oriented programming for programmers who want to write components that can be installed on the Tool palette, see Overview of Component Creation.

• What is an object?
• Inheriting data and code from an object
• Scope and qualifiers
• Using object variables
• Creating
• Defining new classes
• Using interfaces