- 2008 HA2
- 2012 HA2
- Duren Tiga, Pancoran, Jakarta Selatan
- Menteng Atas, Setiabudi, Jakarta Selatan
- (357005) 1999 HA2
- (445974) 2013 BJ18
- (459462) 2013 AY52
- (439313) 2012 VE82
- 2011 GZ2
- Pengadegan, Pancoran, Jakarta Selatan
- HA postcode area
- Digest access authentication
- Hemagglutinin (influenza)
- 7066 Nessus
- Hemagglutinin
- Honda Acty
- Mitsubishi Ki-1
- Acid
- Acid dissociation constant
- List of minor planets: 7001–8000
