| PAR | participating provider; passive avoidance reaction; perennial allergic rhinitis; photosynthetically ... |
|---|---|
| ACN | acute conditioned neurosis; Ambulatory Care Network; American College of Neuropsychiatrists; America... |
| ANN | artificial neural network |
| ARPANET | Advanced Research Projects Agency Network |
| ATN | acute tubular necrosis; augmented transition network |