This application note serves as a go-to glossary for engineers working with pressure sensors, transmitters, and transducers. It defines core concepts like absolute, gage, and differential pressure, while also explaining essential performance parameters such as span, offset, proof pressure, and temperature coefficients. Whether you're troubleshooting a sensor, selecting between a transducer and transmitter, or decoding terms like BFSL, hysteresis, and TEB, this reference guide clarifies the technical language behind pressure measurement. Ideal for both new engineers and seasoned professionals looking to brush up on terminology, it lays a clear foundation for more advanced application notes to come.