This category is within the scope of WikiProject Categories, a collaborative effort to improve the coverage of categories 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.CategoriesWikipedia:WikiProject CategoriesTemplate:WikiProject CategoriesCategories 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
