olemus
üldotstarbeline C-keelt laiendav objektipõhine programmikeel,
eeskätt Apple'i platvormidel Mac OS X ja iOS
= a general-purpose, object-oriented programming language that's a superset of C language

ülevaateid
https://en.wikipedia.org/wiki/Objective-C

http://andrewd.ces.clemson.edu/courses/cpsc102/notes/ObjC.pdf

https://doc.lagout.org/programmation/Objective-C%20-%20Cocoa%20-%20OS%20X%20-%20Xcode/Objective-C%20Fundamentals%20-%20Fairbairn%2C%20Fahrenkrug%2C%20Ruffenach%20-%20Manning%20%282011%29.pdf