AM	arm movement
API	application programming interface
ArSL	Arabic Sign Language
ASL	American Sign Language
BdSL	Bangladeshi Sign Language
CESAR	Recife Center for Advanced Studies and Systems
CSL	Chinese Sign Language
CSV	comma-separated values
CNN	convolutional neural network
DGS	German Sign Language (Deutsche Gebärdensprache)
EMG	electromyography
FLV	flash video
fps	frames per second, frame rate
GCAR	graph convolution with attention and residual connection
GCN	graph convolutional network
GRU	gated recurrent units