ADM
- A.D.M. (album)
- AD/M-19
- ADM (Amsterdam)
- ADM formalism
- ADM-3A
- ADM-Aeolus
- Abductor digiti minimi muscle of hand
- Adaptive delta modulation
- Add-drop multiplexer
- Additional district magistrate
- Adel–De Soto–Minburn Community School District
- Adisham railway station
- Administrative Template
- Admiral Group
- Admiralty MRT station
- Admiralty station (MTR)
- Adrenomedullin
- Agency debit memo
- Air data module
- Alex de Minaur
- American Dream Meadowlands
- Ammonium dimolybdate
- Archer Daniels Midland
- Architecture-driven modernization
- Ardmore Municipal Airport
- Ardmore station (Oklahoma)
- Arrow diagramming method
- Assyrian Democratic Movement
- Astra Daihatsu Motor
- Atomic demolition munition
- Auto Dynamic Metering
- Automated decision-making
- Autoroutes du Maroc
- Aéroports de Montréal
- Aéroports du Mali
- Lean IT
- Pilot decision making
- The Open Group Architecture Framework