AHRS	Attitude and Heading Reference System
API	Application Programming Interface
BP	Blood Pressure
DFT	Discrete Fourier Transform
ECG	Electrocardiogram
EDA	Electro-Dermal Activity
EMG	Electromiogram
ESP-IDF	Espressif IoT Development Framework
EVA	Ethyl–Vinyl Acetate
FIFO	First In First Out Memory
GPS	Global Positioning System
HID-I2C	Human Interface Device over I2C protocol
HR	Heart Rate
HRV	Heart Rate Variability
IBI	Inter-Beat Interval
IMU	Inertial Measurement Unit
LIPO	Lithium Polymer
MCU	Micro-Controller Unit
MsWH	Multi-sensor Wearable Headband
PCB	Printed Circuit Board
PPG	Photoplethysmography
RR	Respiration Rate
SiP	System in Package
SPI	Serial Peripheral Interface
SpO2	Oxygen Saturation
SRT	Step Response Time
ST	Skin Temperature
TIA	Trans-Impedance Amplifier
TCP	Transmission Control Protocol
UART	Universal Asynchronous Receiver/Transmitter
UDP	User Datagram Protocol