| Abbreviation | Definition |
|---|---|
| RWW | Remote Web Workspace |
| RX | Receive |
| RXC | Remote Execution Control |
| RXD | Receive Data |
| RXD | Receiver Downstream |
| RXJ | Receive and Reject |
| RXN | Radianz Network |
| RXP | Roaming eXchange Protocol |
| RXX | Receiver Remote Restart |
| RYM | Refer Your Mail |
| S | Server |
| S | Session |
| S | Sharing |
| S/MIME | Secure Multipurpose Internet Mail Extensions |
| SA | Security Association |
| SA | Server Address |
| SA | Source Address |
| SA | System Administration |
| SA | System Administrator |
| SAAE | Sufficient and Appropriate Audit Evidence |