The document discusses collaborative development models and their applications beyond just software. It notes that: 1) Many software projects already involve non-code artifacts like documentation and graphics that can be collaboratively developed. 2) Experiments with collaborative models in non-software domains like Wikipedia have shown quality on par with traditional models when evaluated identically. 3) While software is uniquely suited due to its modular structure, many non-software projects also have modular structures that enable collaborative development through platforms like wikis. The lack of unifying platforms is a main difference between domains.