What does NASO stand for?

Nadvornikia sorediata R. C. Harris - Scientific name - Family: Thelotremataceae - USDA National Plant Data Center symbol - Botany - Taxonomy (USDA)

Natchez & Southern Railway Co. - AAR code - Terminated

National Adult School Organisation - British

National Association of Sports Officials (EA)

National Astrological Society - Defunct (EA)

National Astronomical Space Observatory

Naval Aviation Supply Office

Nonacoustic Sensor Operator - Military (CAAL)

North American Space Operations (SAUS)