The one that sticks with me is called “the cold equations”, and it’s about a pilot flying a ship through space and discovering he has a young girl stowing away on board. Since he only has enough fuel to get to his destination if the ship weighs a very specific amount, he has to decide whether or not to jettison the girl out the airlock. I remember liking it, but I’ve never forgotten how emotional it was to read.
I mean, the people making them, for one.