2 of 4 Added supporting link, expanded definition of 'older Raspberry Pis'

Boot Zero W from USB device

The older Raspberry Pi's (Pi 1, Pi 2 and Pi Zero) couldn't boot from a USB-device, but the Raspberry Pi 3 has support for it. The Raspberry Pi Zero W is a remake of their older board but it's newer than the Raspberry Pi 3.

Is the Raspberry Pi Zero W compatible with the new bootcode? Can the Raspberry Pi Zero W boot from USB?