What does VX stand for?

What does VX mean?

VX	Air Test and Evaluation Squadron Governmental » Military
VX	Vialog Corporation Business » AMEX Symbols
VX	Virtual Experience Corporation Business » Firms
VX	Version number x Computing » Software
VX	Visual Xpression Computing » Software
Vx	Best angle of climb Velocity Miscellaneous » Aircraft
VX	Velocity along the X-axis (horizontal) Governmental » NASA
VX	Tata Safari VX car Business » Products
VX	Nerve Agent (O-Ethyl S-Di-IsopropylAminomethyl MethylPhosphonoThiolate) Governmental » Military
VX	Vaccine for cat or dog Medical » Veterinary