1. 
   VSO
   An abbreviation of the term Vacuum Tube Volt Meter (a device that measures the electrical voltage and uses a vacuum tube to drive the indicator so that testing the circuit does not load the circuit.
   Found op http://www.testing1212.co.uk/a.htm
   
   
2. 
   VSO
   VSO is a three-letter acronym with multiple meanings, as described below: ...
   Found op http://en.wikipedia.org/wiki/VSO
   
   
3. 
   vso
   1) Abbr. on a brandy label 2) Brandy designation letters 3) Brandy letters 4) Letters on a brandy bottle
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/vso/1
   
   
4. 
   VSO
   Acronym for "Very Special Old" or "Very Superior Old" (very excellent and old) as an indication of the maturity period, see Cognac .
   Found op http://www.wein-plus.eu/en/VSO_3.0.2322.html
   
   

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