The document provides information about stock management in Open ERP. It describes how Open ERP uses a double-entry system to track stock moves between locations rather than losses or consumption. It also outlines the key tools and operations for managing stock, including defining warehouses and locations, managing inventory levels and replenishment, and calculating theoretical stock. Finally, it provides examples to illustrate how the double-entry system works when products are ordered, delivered, adjusted, or have stock rules defined.