CA	Customer Activity
CAR	Customer Activity Recognition
E2E	End-to-End
HOG	Histogram of Oriented Gradients
CNN	Convolutional Neural Network
UWB	Ultra-Wideband
IoU	Intersection over Union
HMM	Hidden Markov Model
LSTM	Long-short Term Memory
SVM	Support Vector Machine
FPS	Frame Per Second
ATP	Approximate Trajectory Partitioning
ME	Motion Event
RE	Relation Event
SA	Shelf Area
VA	Viewing Area