I believe that the MKS system is more commonly used than the CGS system now.
"I believe that the MKS system is more commonly used than the CGS system now."
But those aren't really different system. They're just different preferred units of measure in day to day use, centimetres being a 1/100th of a metre and a Kilo being a 1000 grams. I'd tend to say you're right about MKS, though, because the major derived units of measure (Newtons, Joules, Watts, etc) are based on those units.