| A&E | Alarms & Events |
| ANSI | American National Standards Institute |
| API | Application Program Interface |
| ARCNET | Attached Resource Computer NETwork |
| ASHRAE | American Society of Heating, Refrigerating and Air-Conditioning Engineers |
| ASN.1 | Abstract Syntax Notation One (ISO 8824) |
| BACnet | Building Automation and Control networks |
| COV | Change of Value |
| DA | Data Access |
| HDA | Historical Data Access |
| HMI | Human-Machine Interface |
| IEC | International Electrotechnical Commission |
| IP | Internet Protocol - RFC 791 |
| ISO | International Organization for Standardization |
| LAN | Local Area Network |
| MES | Manufacturing Execution System |
| NaN | "Not a Number", a unique binary pattern representing an invalid number |
| (see ANSI/IEEE 754-1985) |
| NAT | Network Address Translation - RFC 2663 |
| PICS | Protocol Implementation Conformance Statement |
| UA | Unified Architecture |
| UTC | Universal Time Coordinated |
| XML | Extensible Markup Language |
