> Typewriter keys cost money They didn't just cost money. They were competing to the limited space around the typing area, what meant they were constrained at

> Typewriter keys cost money They didn't just cost money. They were competing to the limited space around the typing area, what meant they were constrained at the border of a circumference that would be entirely filled with mechanisms. In other words, the cost in both money, size, and weight depended on the square of the number of keys.