- Andre, Carl1
- Andrews, Richard1
- Anglim, Paule5
- Ant Farm1
- Ant Farm728
- Ant Farm; Lord, Chip3
- Ant Farm; Lord, Chip; Michels, Doug; Schreier, Curtis3
- Ant Farm; Michels, Doug2
- Ant Farm; Schreier, Curtis8
- Ant Farm; T.R. Uthco1
- Antin, D.; Baer, J.; Atkinson, T.; Baldwin, M.; Glass, P.; Graham, D.; Maciunus, G. designer; Mac Low, J.; Morris, R.; Rainer, Y.; Ruscha, E.; Serra, R.; Smithson, R.; La Monte Young, others;1
- Antin, Eleanor3
- Antonakos, Stephen1
- Appel, Karel2
- Applebroog, Ida14
- Armer, Ruth1
- Asher, Michael1
- Atkinson, Conrad10
- Atthowe Transportaiton Co. Inc. / Atthowe Fine Arts Service1
- Axelrod, Mark1