The Ranger.
Many, many people. No one keeps track in a central location to have an official number.
Autopilot keeps an aircraft on course. In modern times autopilot is assisted by GPS and radar.
secretary of state
No
An auto-pilot
Unless she is visibly sick, you can't tell. That is why you always use a condom with casual sex. It also keeps you from becoming a father.
GRAVITY of course!
The pilot and navigation crew, with the aid of navigational equipment.
The home team's scorekeeper decides the official statistics for each game.
well, of course what else will he want your attention for?
Of course carnivors depend on meat that keeps them alive
Eat it.of course! it keeps you alive.