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Donald A. Yacktman has been using Cocoa and its predecessor technologies, OpenStep and NextStep, professionally since 1991. He is currently the vice president of Development at illumineX, an independent software vendor of Cocoa-based Mac OS X software and a WebObjects consulting firm. Yacktman is a member of the Stepwise editorial staff and the principal contributor to the MiscKit, a premier source of information and reusable software for the OpenStep and Cocoa communities. Yacktman has been programming professionally since 1981.