Yes, calculators are made from plastic ^^

[HP67]

I note most of the middle to high-end calculators today regardless of brand seem to have the same physical layout with shift and arrow keys all in the same place. Look at the 50g and then look at the TI-84 and 89 and some Casios. Kinpo sure does make a good business out of selling the same stuff over and over again under different labels! What do calculators and anti-freeze have in common? ;-)