PPG	Photoplethysmography
$Sp{O}_2$	Oxygen Saturation
ECG	Electrocardiogram
BVP	Blood Volume Pulse
ANS	Autonomic Nervous System
PR	Pulse Rate
IBI	Interbeat Intervals
HRV	Heart Rate Variability
PRV	Pulse Rate Variability
EMG	Electromyogram
EDA	Electrodermal Activity
PVB	Premature Ventricular Beat
GSR	Galvanic Skin Response
ST	Skin Temperature
STL	stereolithography
BLE	Bluetooth Low Energy
MAC	Media Access Control
MCU	Microcontroller Unit
SoC	System on Chip
PCB	Printed Circuit Board
SMT	Surface Mount Technology
TPU	Thermoplastic Polyurethane
SCWT	Stroop Color Word Test
PCA	Principal Component Analysis
TSST	Trier Social Stress Test