The consensus among users of this Wiki is that the default copyright for all material herein should be assumed to be:
This is similar to GNU's copyleft in that you have freedom to use this content, either intact or with modification, but any derived work must give credit to this Wiki AND must be covered under the same copyright. In other words, your derived work must give as much freedom as the original. Note that freedom does not necessarily mean free of charge. You can write a book about CHIP and include as much of this content as you like, and sell the book for as much as you can get. But you cannot restrict your buyers from making copies of your book and giving them away free of charge if they want. If you don't want that to happen, then don't copy content from this Wiki. Make it your own work!