- DNAA stands for Deutsche Neuro AIDS Arbeitsgemeinschaft eV (German: German Association of Neuro-AIDS; est. 1996; Hanover, Germany)
- DNAA stands for Delayed Neutron Activation Analysis
- DNAA stands for Durham and Northumberland Archery Association (UK)
- DNAA stands for Driffield Navigation Amenities Association (UK)
- DNAa stands for Defective DNA of the Bacteria Escherichia Coli
DNAA