The LDE book store was founded in 1998 with the primary purpose of providing textbooks and other books to schools (primary, secondary schools, etc.). In just 10 years, it has become number one in its sector with a range of innovative services. To do so, all its management tools (e.g. CRM) have been developed internally with 4D from the beginning, and a full Web SAAS application also running on 4D is available to the over 450 schoosl that connect to it simultaneously.