| A/D | analog-to-digital [converter] |
|---|---|
| ADC | adult day care [facility]; affective disorders clinic; Aid to [Families with] Dependent Children; AI... |
| DA | dark adaptation; dark agouti [rat]; daunomycin; degenerative arthritis; delayed action; Dental Assis... |
| D/A | date of accident; date of admission; digital-to-analog [converter]; discharge and advise |
| DAC | derived air concentration; digital-to-analog converter; disaster assistance center; Division of Ambu... |