- Source: HSO
HSO may refer to:
Orchestras
Harrisburg Symphony Orchestra, Pennsylvania, United States
Hartford Symphony Orchestra, Connecticut, United States
Helena Symphony Orchestra, Montana, United States
Hereford String Orchestra, England
Hillsboro Symphony Orchestra, Oregon, United States
Hollywood Symphony Orchestra, California, United States
Houston Symphony, Texas, United States
Huntsville Symphony Orchestra, Alabama, United States
Other uses
Ford HSO engine
Hamburg State Opera
Health Sciences Online
Healthscope, an Australian hospital operator
Herschel Space Observatory
Hungarian Space Office