Cocoa (OS X) vs openSUSE: What are the differences?
Cocoa (OS X): The Cocoa frameworks consist of libraries, APIs, and runtimes that form the development layer for all of OS X. Much of Cocoa is implemented in Objective-C, an object-oriented language that is compiled to run at incredible speed, yet employs a truly dynamic runtime making it uniquely flexible. Because Objective-C is a superset of C, it is easy to mix C and even C++ into your Cocoa applications; openSUSE: The makers' choice for sysadmins, developers and desktop users. The openSUSE project is a worldwide effort that promotes the use of Linux everywhere. openSUSE creates one of the world's best Linux distributions, working together in an open, transparent and friendly manner as part of the worldwide Free and Open Source Software community.
Cocoa (OS X) belongs to "Frameworks (Full Stack)" category of the tech stack, while openSUSE can be primarily classified under "Operating Systems".