Answer:
I look at you, you look at me, I raise my right, you raise your left
These are needed to finish a test
Pointing North, South, East, and West it saves the lost and helps the rest. What is it?
I make billions of dollars selling Windows. Who am I?
A mechanism to discover who is following you.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.