What is the difference between piano and keyboard?

I think you need to play it harder for the piano. Since even if you touch the keyboard with lower strength, its sound is still the same. But playing the piano is different. You have to use some strength. I love China

Keyboard is part of the piano. I guess what you mean is portable electronic organ or just an electronic organ. Keyboard is not the right term for musical instruments like piano and organ because computers have also keyboard. It is called computer keyboard. I used to associate keyboard with musical instruments but I was corrected that it is not the right term. I hope you've got my point.