Answer :
Explanation :

IMS (Information Management System) is IBMs hierarchical database management system. It has mainly two components: IMS DB and IMS DC (Also know as IMS TM) IMS DB - IMS/Database Manager as the name implies manages the IMS databases. It is used for physical storage creation and management and data retrieval. IMS DC / IMS TM - IMS/Data Communications or IMS/Transaction Manager handles online transaction processing system.