That’s really all I do for lights or darks

Just in case it’s not clear for Americans, those temperatures are in Celsius. But you can pretty much interpret them as one dot low, two dots medium, or three dots high on your machine (double check user manual to be sure). More dots equals higher temperature.

This doesn’t come close to listing all the companies they’re competing with in each of those spaces, and in some cases those competitors came later to take on a service Amazon developed. I’m 90% sure Microsoft Azure came along after AWS and I think Alexa was the first of that kind of device, before the Google Home speakers. It’s a good overview of some of the diverse markets they’re in, though.