FDD	Fault detection and diagnosis
ML	Machine Learning
DL	Deep Learning
CM	Condition Monitoring
AI	Artificial Intelligence
BD	Big Data
IoT	Internet of Things
CC	Cloud Computing
AWS	Amazon Web Services
TCU	Traction Control Unit
LCC	Life Cycle Cost
SB	Signal-based
MB	Model-based
DD	Data-driven
FFT	Fast Fourier Transform
STFT	Short Time Fourier Transform
PCA	Principal Component Analysis
RUL	Remaining Useful Life
ESS	Energy Storage Systems
ANN	Artificial Neural Network
SVM	Support Vector Machine
CNN	Convolutional Neural network
MLP	Multi-Layer Perceptron
DNN	Deep Neural Network