ADL	Activities of Daily Living
AI	Artificial Intelligence
ANN	Artificial Neural Network
AR	Augmented Reality
BCI	Brain–Computer Interface
CNN	Convolutional Neural Networks
CNS	Central Nervous System
DBS	Deep Brain Stimulation
DC	Direct Current
DL	Deep Learning
DMD	Duchenne Muscular Dystrophy
DOF	Degrees of Freedom
DQN	Deep Q-Networks
ECoG	Electrocorticography
EC-PC	Exponential-Component–Power-Component
EEG	Electroencephalography
EM	Expectation Maximization
EMG	Electromyography
FDA	Food and Drug Administration
FES	Functional Electrical Stimulation
GPU	Graphical Processing Units
HCI	Human–Computer Interaction
HMI	Human–Machine Interface
HRI	Human–Robot Interface
LL	Lower Limb
LSTM	Long Short-Term Memory
MEG	Magnetoencephalography
MEMS	Microelectromechanical Systems
ML	Machine Learning
MRI	Magnetic Resonance Imaging
MUs	Motor Units
NEMS	Nanoelectromechanical Systems
NLU	Natural Language Understanding
OC	Object Classification
PC	Personal Computer
PNS	Peripheral Nervous System
PCA	Principal Component Analysis
RF	Radio Frequency
RL	Reinforcement Learning
RNN	Recurrent Neural Networks
SCI	Spinal Cord Injury
TBI	Traumatic Brain Injury
TDCS	Transcranial Direct Current Stimulation
TMS	Transcranial Magnetic Stimulation
TMSR	Targeted Muscle and Sensory Reinnervation
UL	Upper Limb
VLSI	Very Large-Scale Integration
VR	Virtual Reality
VRE	Virtual Reality Environment
WT	Wavelet Transform
YOLO	You Only Look Once