Delphi is a language for rapid development of native Windows, OS X and iOS applications through use of Object Oriented Pascal. The name also refers to the Delphi IDE, which is used to help edit and debug Delphi projects more efficiently.

Delphi is a general purpose language for rapid development of native Windows, OS X and iOS applications.

The name also refers to the Delphi IDE, which is used to help edit and debug Delphi projects more efficiently. It is sold by Embarcadero, as a standalone product or included in RAD Studio, which includes other languages as well.

Delphi is used for the RAD Studio personality using Delphi as the programming language of choice. Delphi is an enhancement of Niklaus Wirth's language Pascal.

Delphi originated in 1995 at Borland, evolving from Turbo Pascal. It quickly became the language of choice for Windows programming. It is currently owned by Embarcadero, and is the second-largest Windows development platform after Microsoft's .NET.

Delphi is the father of C#, with the VCL being moved to the OS level and extended as the .NET framework. Delphi's Chief Architect [Anders Hejlsberg][19] is now Lead Architect for C# at Microsoft.

Among Delphi's strengths are its easy learning curve, consistent language architecture, a blazingly fast compiler, great execution speed, modern language constructs, its extensive Visual Component Library (VCL), and the associated visual form designer.

Variants: Some other Embarcadero products are or were released using the "Delphi" brand. A .NET variant called Delphi Prism (Delphi Prism is not a Delphi variant at all, Delphi.NET was. Prism is based on PascalScript codebase) exists that lives in MS Visual Studio and allows for cross platform development using Mono (also, CLR is not "cross-platform", but platform itself. It is offtopic here, as it is distinct). It's mostly compatible with Delphi syntax, but uses very different libraries. The Embarcadero PHP product used to be labelled "Delphi" until recently, and there is an AS/400 version of Delphi too. Both the PHP product and Prism are integrated in the main Embarcadero studio project in the current version, Rad Studio XE2.