SAP Business Objects Enterprise XI 3.1 is the industrial strength Business Intelligence Platform for large organisations. It is fully scalable using distributed architecture to enable Web Intelligence, Crystal Reports, Dashboards and other documents to be shared throughout the organisation. The number of users that it can scale to is dependent upon the hardware made available to it and the license model purchased. Its server based architecture means that it can handle high volume report access. Earlier versions of XI 3.1 are known as SAP Business Objects Enterprise XI and SAP Business Objects Enterprise XI R2. You can read more about Business Intelligence Platform Scalability here.