There are multiple definitions:

1. Department of Energy(English)

   • in USA
   • Organizations (governmental)

2. dyspnea on exertion(English)

   • EVH, BMI, HFpEF, SOB
   • Stress (test), Pulmonology, Oxygen, Cardiology
   • https://doi.org…siol.00432.2026

3. diffractive optical element(English)

   • CPMHA, MLA, Nd-YAG
   • Laser technique, Dermatology
   • https://doi.org….1111/srt.12853

4. Design of Experiment(English)

   • BEV, CAE, EV, FEA, GnP, h-BN, HEV, MAPE, PHEV, RSM, RVE, SEBS
   • Engineering aspects, Energy transition
   • https://doi.org…our.2025.236594