Objectworks

An object-oriented development environment developed by ParcPlace, available under Smalltalk and C++.

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VisualWorks

An application development environment for Smalltalk for Windows, Mac and Unix from Cincom Systems. Introduced in 1991, it includes development tools such as a compiler, debugger, GUI builder and class browser. Cincom acquired the VisualWorks product line from ObjectShare, Inc. in 1999 and packaged it with the ObjectStudio toolset to make up its Smalltalk development environment. VisualWorks was originally ObjectWorks from ParcPlace, which was spun off of Xerox PARC in 1987 and merged with Digitalk in 1995 to form ObjectShare. See Smalltalk.

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This result is similar to ParcPlace's ObjectWorks class hierarchy, which also has a special root class for the Model.

The interaction of social issues and software architecture

Examples include Apple's MacApp (for building a Mac interface), Borland's ObjectWindows, and the model-view-controller architecture within ParcPlace System's Objectworks (6, 8).

In ParcPlace System's Objectworks, this application of a broadcast pattern is called model-view-controller (MVC); the innovative work on MVC (6, 8) is the basis for abstracting and then applying the "broadcast" pattern.

Object-oriented patterns

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