This aside, the Harry was quite an advanced machine, and the only system like it for its time.

This is the only system that would effectively serve the public's best interests.

The only economic system they may know is simple barter.

It was the only system of the season to make landfall.

This being the only system, any result other than by it is accidental.

Indeed, it is the only system in which two card holders can transfer money to each other.

But are human and animal brains the only systems able to interpret the world in such a way?

This is, of course, the only interoperable system which people can use when they are in another country.

Not at once; it is the only system they know and nothing would work without it.

How it was the only system that could do so?