Andy M.
Certified Pretend Chef
Yeah, I've never had or used a traditional pressure cooker, so I was vaguely remembering what I'd read about it [emoji38]
Electronic pressure cookers have sensors that allow them to regulate the pressure by releasing steam while it's working. Once the time is up, it releases steam naturally, or you can turn the valve and release it all at once.
With the old style PCs, for a quick pressure release, you put the pot in the sink and ran cold water over it.