A2G	Air-to-Ground
AMPS	Advanced Mobile Phone System
APs	Altitude Platforms
BS	Base Station
CAPEX	Capital Expenditure
CDMA	Code Division Multiple Access
D2D	Device-To-Device
FANET	Flying Ad-Hoc Network
FFTx	Fiber-To-The-x
GBS	Ground BS
GEO	Geostationary Orbit Satellite
GT	Ground Terminal
HAPs	High-altitude Platform
ISP	Internet Service Provider
KPI	Key Performance Indicator
LAPs	Low-Altitude Platform
LDC	Least-Developed Country
LEO	Low-altitude Earth Orbit Satellite
LOS	Line-of-Sight
LTE-NR	LTE-New Radio
MANET	Mobile Ad-Hoc Network
MCI	Mobile Connectivity Index
MEO	Medium-altitude Earth Orbit Satellite
ML	Machine Learning
MNO	Mobile Network Operator
MTC	Machine-Type Communication
NLOS	Non-Line-of-Sight
NOMA	Non-Orthogonal Multiple Access
PL	Path Loss
QoS	Quality Of Service
RDP	Rural Population Density
SNR	Signal-to-Noise Ratio
SCPs	Stratospheric Communication Platforms
SUAV	Small UAV
SWAP	Size, Weight, and Power constraint
TBD	To-Be-Developed
TVWS	Television White Space
UAS	Unmanned Aerial System
UAV	Unmanned Aerial Vehicle
UE	User Equipment
UHF	Ultra High Frequency
UTM	UAS Traffic Management
VANET	Vehicular Ad-Hoc Network
VDSL	Very-high-bit-rate Digital Subscriber Line