NOOBS is the built-in operating system installer for Raspberry Pi. But if you already know which operating system you want to use, there's a quicker way to get your Pi up and running.

If you have about 10 hours to kill, you can use [Edje Electronics’s] instructions to install TensorFlow on a Raspberry Pi 3. In all fairness, the amount of time you’ll have to babysit i… ...

While TensorFlow can be used on Linux, Windows, Android, macOS, and iOS, it's hard to find cheaper hardware than the $35 Raspberry Pi.