Data categories are a way to classify and organize your knowledge articles based on criteria such as products, topics, or audiences. You can create data category groups to define the top-level categories for your articles, and then create subcategories within each group. You can also control which users can access which categories based on their roles or permission sets. To meet the requirement of Universal Containers, you can create a single data category group for each division and assign the categories to the roles that belong to that division.
This way, each division will only see its own articles when performing a search. Verified References: Data Categories