Are you referring to Corrosion Control or digital indents? For
Corrosion Control the following is applicable:- Vpi = Vapour Phase
Inhibitor VCI = Vapour Corrosion Inhibitor Alternate is to use
VpCI. Vapour phase Corrosion Inhibtor. They are all the same thing
but subject to marketing spin like BMW's idrive and Audi's MMI.