title: Is Objective-C only used for development on Mac OS/iPhone?
body: <p>I don't know Objective-C but to me it appears a nice language. But the only context I know it from is everything Apple. But Objective-C is even in the GNU Compiler Collection. </p>
  
  <p>Is there something missing in the open ones? Or is there already a broader base for Objective-C? I'm interested if there are companies that chose Objective-C to develop their products.</p>