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Though we are interested in iPhones, MacBooks and many other productions by Apple, Objective-C is not a very familiar language for most of us. Though it’s an extension of C language, it has many differences in syntax. 

This is the main programming language used by Apple in their OS X (Mac OS X) and iOS (iPhone OS) and this is based on the language Smalltalk which is one of the very first object oriented languages.

So, Objective-C has the features like many other object oriented languages. This consists of a library of objects, a suite of development tools and a runtime environment.