Interface API (DI-API), where you can create new business object around the normal SAP Business One client but still adhere to the core business rules User interface API (UI-API), where you can modify existing SAP Business One client screens, create new screens and change/block the normal event flow SAP Business One Integration Technology (B1i), where you can visually create Business flows using XML/XSLT Service Layer for SAP HANA, where you can, using OData, create business objects Service Layer for Microsoft SQL Server, where you can, using OData, create business objects See also List of ERP vendors References External links The History of SAP Business One on LinkedIn Accounting software Customer relationship management software ERP software Business One