| NOD | Network On Demand |
| NS | Network Services |
| NS | (Vendor Specific) New Start |
+| O-RAN | [O-RAN Alliance, Operator Defined Next Generation Radio Access Networks Alliance](https://www.o-ran.org)
+| O-RAN-SC | [O-RAN Software Community](https://o-ran-sc.org)
+| OAM | Operation and Maintenance |
| OA&M | Operations, Administration and Management |
| OMF | Operational Management Framework (of ONAP) |
| OMSA | ONAP Microservice Architecture |
| OOM | [ONAP Operations Manager](https://wiki.onap.org/display/DW/OOM+User+Guide) |
| OPNFV | [Open Platform for NFV Project](https://www.sdxcentral.com/nfv/definitions/opnfv/) |
| OSAM | [Open Source Access Manager](https://wiki.onap.org/display/DW/OpenSource+Access+Manager+%28OSAM%29+Use+Case) |
+| OSC | O-RAN Software Community or Optical Supervisory Channel |
| OSS | Operations Support System |
| PAP | Policy Administration Point (ONAP) |
| PCE | Path Computation and Element (ONAP) |
| RCA | Root Cause Analysis |
| RCT | Reference Connection Tool |
| REST | [Representational State Transfer](https://en.wikipedia.org/wiki/Representational_state_transfer) |
-| RESTCONF | REST + NETCONF |
+| RESTCONF | A protocol based on HTTP for configuring data defined in YANG |
| RO | Resource Orchestrator |
| RPC | Remote Procedure Call |
| S3P | [Stability, Security, Scalability, Performance](https://wiki.onap.org/pages/viewpage.action?pageId=16003367) |
| VSP | Vendor Software Product (from SDC Demo Guide) |
| VTP | [VNF Test Platform](https://wiki.onap.org/pages/viewpage.action?pageId=43386304) |
| VVP | [VNF Validation Program](https://wiki.onap.org/display/DW/VNF+Validation+Program+Project) |
-| WAR | [Web application Archive](https://en.wikipedia.org/wiki/WAR_(file_format)) |
-| YANG | A Data Modeling Language for the Network Configuration Protocol (NETCONF) |
+| WAR | [Web application Archive](https://en.wikipedia.org/wiki/WAR_(file_format)) |
+| xNF | The combination of PNF and VNF; Network Function |
+| YANG | Yet Another Next Generation - a Data Modeling Language for the Network Configuration Protocol (NETCONF) |