This category is within the scope of WikiProject Caves, a collaborative effort to improve the coverage of caving and cave articles on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.CavesWikipedia:WikiProject CavesTemplate:WikiProject CavesCaves articles
This category is within the scope of WikiProject Invention, a collaborative effort to improve the coverage of Invention on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.InventionWikipedia:WikiProject InventionTemplate:WikiProject InventionInvention articles
