Copyright protects original works of authorship including literary, dramatic, musical, and artistic works, such as poetry, novels, movies, songs, computer software, and architecture. Copyright does not protect facts, ideas, systems, or methods of operation, although it may protect the way these things are expressed.
So if your WSO falls within one of the above areas then it might be worth your time to look into a copyright. Along with a copyright, if your logo or name is important to your product or marketing, then a trademark might be in order.
Hope this helps you guys.