NGO
NRO stands for:
- National Reconnaissance Office , US military intelligence service founded in 1960/61, responsible for the military satellite program
- NGO , and Non-governmental organization ( NGO - of English non-governmental organization )
- No resuscitation order , a term from the field of palliative medicine
- Nobeyama Radio Observatory , radio observatory in Japan
- Number Resource Organization , association of five continental Internet registrars, see Internet Corporation for Assigned Names and Numbers
- Aero Rent (ICAO code), former Russian airline
- Roth train station (DS100 code)