A stove.
fire
The pressure cooker
A electronic rice cooker.
a rice cooker ;)
bonace
focal point
It is called the trade name of AGA
From the research I have gathered a man by the name of Denis Papie created the first electric cooker. He was french and was said to create it in the late 1800's.
rice cooker
To make rice in a microwave rice cooker, first rinse the rice and add it to the cooker with water. Close the lid and cook in the microwave according to the instructions provided with the cooker. Allow the rice to rest for a few minutes before serving.
I'm not sure what kind of cooker you mean, I have a white ceramic slow cooker and have found a few things that work well to remove the stains -- a product called Cerama Bryte, and Magic Erasers. Hope this helps!