| HPC | High Performance Computing |
| ORCM | Open Resilient Cluster Manager |
| ORTE | Open Runtime Environment |
| OPAL | Open Portability Access Layer |
| MCA | Modular Component Architecture (in ORCM context) |
| HNP | Session Head Node Process or Controller Node Process |
| RM | Resource Manager |
| SCD | Scheduler Framework |
| SMS | System Management Server |
| RAS | Reliability, Availability & Serviceability |
| IPMI | Intelligent Platform Management Interface |
| OOB | Out Of Band |
| DB | Database |
| DBMS | Database Management System |
| ODBC | Open Database Connectivity |
| DSN | Data Source Name |
| DBA | Database Administrator |