VSO is a three-letter abbreviation with multiple meanings, as described below: In Linguistic typology, VSO stands for Verb Subject Object In the United States Navy, VSO is used to denote a Scout observation plane Valdosta Southern Railroad Vancouver Symphony Orchestra A variable speed oscillator Vermont Symphony Orchestra Voluntary Service Overseas, an international development charity Vienna State Opera Vienna Symphony Orchestra Volvo B10TL, better known as Volvo Super Olympian. VSO… (More on Vso)