1-CRM and SCM How are they different?
2-CRM and SCM Where do they interact?
3-What kind of technologies used in CRM and SCM?
very often CRM (CustomerRelationManagement) is an frontend of ERP and or SCM (SupplyChainMangement) is the System in between for Processing Customer requests.
CRM is ABAP & JAVA, SCM can be JAVA or ABAP & JAVA,
both have an Database like: Oracle, MaxDB or UDB and an Operating System like Windows UNIX or Linux