| AC | Alternating Current |
| ADC | Analog‐to‐Digital Converter |
| AE | Acoustic Emission |
| AEN | Autoencoder |
| AI | Artificial Intelligence |
| AIO | Analog Input / Output |
| ANN | Artificial Neural network |
| AOI | Automated Optical Inspection |
| CbM | Condition‐based Maintenance |
| CCD | Charge‐Coupled Device |
| CMM | Coordinate Measuring Machine |
| CNC | Computer Numerical Control |
| CPSs | Cyber‐Physical Systems |
| DC | Direct Current |
| DIO | Digital Input / Output |
| DNN | Deep Neural Network |
| DWT | Discrete Wavelet Transform |
| EtherCAT | Ethernet for Control Automation Technology |
| FFT | Fast Fourier Transform |
| FT | Fourier Transform |
| Industry 4.0 | Fourth Industrial Revolution |
| IIoT | Industrial Internet of Things |
| MRA | Multi‐Resolution Analysis |
| MQTT | Message Queuing Telemetry Transport |
| NC | Numerical Control |
| OPC‐UA | Open Platform Communication Unified Architecture |
| PC | Personal Computer |
| PLC | Programmable Logic Controller |
| PM | Preventive Maintenance |
| RM | Reactive Maintenance |
| RF | Random Forest |
| rpm | rotation per minute |
| RUL | Remaining Useful Life |
| SFs | Signal Features |
| S/N | Signal‐to‐Noise |
| STFT | Short‐Time Fourier Transform |
| TCP/IP | Transmission Control Protocol/Internet Protocol |
| TFT‐LCD | Thin‐Film‐Transistor Liquid‐Crystal Display |
| WPT | Wavelet Packet Transform |
