The dollar s role at the center of the global financial system gives the US the ability to raise vast sums of capital without unduly perturbing its economy.

Traditional digital methods rely on perturbing noise in the channel file to hide the message, as such, the channel file must be transmitted to the recipient with no additional noise from the transmission.

The region of space where the gravity of a planet tends to dominate the motion of objects in the presence of other perturbing bodies (such as another planet) is known as the Hill sphere.