Each item has a comprehensive item card, including relevant information like Name, Category, Variants, Variant codes / SKU, Sales price, Purchase price, Default supplier, Product Recipe, and Production Operations.
Items can be used on Sales orders, Manufacturing orders, and Purchase orders.
Items can be accessed by opening the Items screen from the header.
On the Items screen, you'll find tabs at the top of the table where you can choose your Products or Materials.
In Katana, subassemblies are products, not materials. So, subassemblies are included in the Products tab.