3.3 Abbreviations and Symbols
| ERP | Enterprise Resource Planning |
| HMI | Human-Machine Interface |
| HTTP | Hypertext Transfer Protocol |
| IODD | IO-Link Device Description |
| IP | Internet Protocol |
| ISDU | Indexed Service Data Unit |
| MES | Manufacturing Execution System |
| PMS | Production Management System |
| SCADA | Supervisory Control And Data Acquisition |
| TCP | Transmission Control Protocol |
| UA | Unified Architecture |
| XML | Extensible Markup Language |