This article discusses Business Process Modelling in the context of Desklib, an online library for study material. It covers various processes and diagrams used in different scenarios such as hardware retailer's shipment process, pizza delivery, ship procurement process, handling orders, hotel check-in and check-out, and more. It also highlights the importance of collaborative intelligence and business intelligence in improving business outcomes. The article concludes with a case study on IBM's rationale for change.