2D	Two-dimensional
3D	Three-dimensional
5G	Fifth-generation mobile network
AI	Artificial intelligence
AR	Augmented reality
CMR	Collaborative mixed reality
DASH	Dynamic adaptive streaming over HTTP
FOV	Field of view
HMD	Head-mounted display
HTC	Holographic-type communications
I/O	Input/output
IETF	Internet Engineering Task Force
IF	Influencing factor
ITU	International Telecommunication Union
ML	Machine learning
MPEG	Moving Picture Experts Group
MR	Mixed reality
PCC	Point-cloud compression
PME	Physical meeting environment
PUN	Photon unity network
QoE	Quality of experience
QoS	Quality of service
QUIC	Quick UDP Internet connections
RADI	Realistic adaptive dynamic integration
RTSP	Real-time streaming protocol
TCP	Transmission control protocol
ToF	Time of flight
UDP	User datagram protocol
VME	Virtual meeting environment
VR	Virtual reality
WebRTC	Web Real-time communication
XR	Extended reality