While you cannot download a plug-and-play ISO to flash onto a USB drive and boot on your laptop, you can still run and explore Android 1.0 using specialized emulation techniques.
Before the Google Play Store, there was the Android Market. It hosted only a handful of free apps, as paid applications and in-app purchases were not yet supported. Android 1.0 Iso
Whether you want to explore the or analyze the underlying source code ? While you cannot download a plug-and-play ISO to