what were the reasons for the growth of technology and industry during WW2?

I think it their defeat in previous wars that teach them to update on their supplies. That it i know

3 answers

All of the countries involved in this war had to produce a lot of food, weapons, vehicles and medicines FAST. This inspired the scientists and engineers to invent new products and find ways of efficiently making them.
ah i see now thank you ms. sue.
You're welcome. Mohammad.