AIoT	AI-based IoT
AI	Artificial Intelligence
AR	Augmented reality
BD	Big Data
BIM	Building Information Modeling
CDT	Cognitive Digital Twin
CT	Cognitive Twin
CPS	Cyber-Physical Systems
DL	Deep learning
DM	Digital Model
DT	Digital Twin
DS	Digital Shadow
DLT	Distributed Ledger Technologies
FIS	Fuzzy interference systems
GIS	Geographic Information System
GPS	Geospatial position
GRL	Goal-oriented requirement language
HMD	Head-mounted display
IR	Infrared
ICT	Information and Communication Technology
IP	Intellectual property
IoT	Internet of Things
JSON	JavaScript Object Notation
LiDAR	Light detection and ranging
LPWAN	Low Power Wide Area Networks
LoRa	Long-Range
LTE	Long-Term Evolution
ML	Machine learning
MR	Mixed-Reality
NB-IoT	Narrow-Band IoT
OPC	Open-source communication platforms
PO	Physical Object
PT	Physical twin
PLC	Programmable logic controllers
PWM	Pulse width modulation
SDT	Strategic DT
SWAMP	Smart Water Management Platform
TI	Tactile Internet
UA	Unified Architecture
VR	Virtual reality
WPAN	Wireless Personal Area Networks
WLAN	Wireless Local Area Networks
WWAN	Wireless Wide Area Networks