The previous version was a theme and is still available - https://wordpress.org/themes/p2/
This version is also a theme and will be released for self hosting in future too.
This version is also a theme and will be released for self hosting in future too.
First there was actually the Prologue theme, then P2 was the second version (~2010?). Then O2 because “communication is oxygen for an organization”. Now back to P2 because that is the name that has stuck and everyone uses.
We (Automattic) use it as both a noun and a verb at this point. P2 or it didn’t happen.