Objective-C (Computer program language)

Work cat.: 2008049771: Kochan, Stephen G. Programming in Objective-C 2.0, 2009: (Objective-C is an object-oriented computer programming language; was designed in the 1980s; based on a language called SmallTalk-80; Objective-C was layered on top of the C language, meaning that extensions were added to C to create a new programming language that enabled objects to be created and manipulated; programming language for Mac OS X Leopard)
Wikipedia, Nov. 11, 2008 (Objective-C is a reflective, object-oriented programming language which adds Smalltalk-style messaging to C)