Do not capitalize state when it is used in place of the actual state name. He is an employee of the state. (P eople working for the state government, however, might write State.) c. Kentucky, Massachusetts, Pennsylvania, and Virginia are actually commonwealths.
AutoCAD and AutoCAD LT are quite similar but not identical. In this extra Part of Tens are the ten (okay, eleven) most significant differences between the AutoCAD and AutoCAD LT programs.
So the real difference between Servo and VFD drives is the use they are designed for. A servo is for accurate positioning and a VFD is for accurate speed control.