| MIO | minimum identifiable odor; modular input/output |
|---|---|
| MPO | maximum power output; minimal perceptible odor; myeloperoxidase |
| NERO | noninvasive evaluation of radiation output |
| PAO | peak acid output; peripheral airway obstruction; plasma amine oxidase; polyamine oxidase; pulmonary ... |
| RLO | residual lymphatic output |