ARD
- ARD (broadcaster)
- ARD International Music Competition
- Accelerated Rehabilitative Disposition
- Acid rock drainage
- Acireductone dioxygenase (iron(II)-requiring)
- Aging-associated disease
- Alcohol-related dementia
- Alliance for Restoration of Democracy
- Alor Island Airport
- American Research and Development Corporation
- Apple Remote Desktop
- Arad, Iran
- Ard (biblical figure)
- Ard (plough)
- Ard (surname)
- Ard Ayush
- Ard Louis
- Ard Patrick
- Ard Schenk
- Ard Sluis
- Ard van Peppen
- Ard van der Steur
- Ard, Arkansas
- Ard, Inverness
- Ardgay railway station
- Ardmore station (Pennsylvania)
- Ardpatrick, Argyll
- Ardpatrick, County Limerick
- Ards (disambiguation)
- Army Reconnaissance Detachment 10
- Atmospheric Reentry Demonstrator
- Auxiliary repair dock
- Das Erste
- Democratic Republican Alliance
- Heavy Metal (film)
- Hull classification symbol
- List of townlands of County Louth
- List of townlands of County Tyrone
- Marion Merrell Dow
- Pietro Arduino
- Republican Alliance for Democracy
- Right Romania Alliance