ACC	accelerometer
ANS	autonomic nervous system
API	application programming interface
BLE	Bluetooth Low Energy/Bluetooth 4.0
Bpm/bpm	beats per minute
CI	confidence interval
DiY	do-it-yourself
ECG	electrocardiography
EDA	electrodermal activity
EEG	electroencephalography
EMG	electromyography
EOG	electrooculography
GSR	galvanic skin response
HF	High Frequency
HF(nu)	High Frequency normalized unit
HR	Heart Rate
HRV	heart rate variability
Hz	Hertz
IAPS	International Affective Picture System
ICC	Intraclass Correlation Coefficient
LF	Low Frequency
LF(nu)	Low Frequency normalized unit
LF/HF	ratio between low frequency and high frequency
LoA	Limits of Agreement
LSL	Lab Streaming Layer
LUX	photo transistor
MEG	magnetoencephalography
Q-Q plot	quantile-quantile plot
RMSSD	Root Mean Square of Successive Differences
SDNN	Standard deviation of the NN (R-R) intervals
USB	Universal Serial Bus
VLF	very low frequency
XDF	extensible data format