DFSMS: Data Facility Storage Management Subsystem DFSMSdfp: Data Facility Product DFSMSdss: Data Set Services DFSMSrmm: Removable Media Manager DFSMShsm: Hi

DFSMS: Data Facility Storage Management Subsystem DFSMSdfp: Data Facility Product DFSMSdss: Data Set Services DFSMSrmm: Removable Media Manager DFSMShsm: Hierarchical Storage Manager DFSMStvs: Transactional VSAM Services DFSMSopt: Optimizer See ABCs of z/OS System Programming Volume 3 (SG24-6983), https://www.redbooks.ibm.com/redbooks/pdfs/sg246983.pdf https://www.redbooks.ibm.com/redbooks/pdfs/sg246983.pdf.