 So this is a simple one, but a really powerful one, and this is a file that exists on pretty much any device that you're running CircuitPython on, and it is called bootout.txt. So let's take a look at what this is and why it's useful. So I've got CircuitPlaygroundExpress plugged in here. It's running CircuitPython. I'm going to hit open and head to the CircuitPy drive, and instead of opening code.py, which we usually do, I'm opening boot underscore out.txt, bootout.txt. There we go, I've got it open now, you can see the file name at the top there in the tab. So the bootout tells you these important things. What version of CircuitPython we're running on here, so we can see this says I'm running Adafruit CircuitPython 7.3.3, and that was from the 29th of August, 2022. And then it lets me know the board I'm on. So I've got an Adafruit Circuit PlaygroundExpress with a SAMD21G18 and the board ID, which is CircuitPlaygroundUnderscoreExpress. So this is great because sometimes you may wonder what version am I running here, this is where you can find out. So that is what that friendly little file is for. And so that is how you can use bootout.txt on your CircuitPython hardware to figure out what version of CircuitPython you're running and more. And that is your CircuitPython Parsec.