I KNOW there was a post on a swap of the F20A into an accord quite recently, but Does anyone have the designations for the engine such as F20A?-what comes after the A for the DOHC model, and it is NOT vtec right? (like I have an F22A4)

Basically, I would like a run-down on the F20 A series because I am pretty sure that the 'B' is the de-stroked H22 and the 'C' is the S2000 engine. I have searched and posted in the hybrid section but I found nothing and no-one responded
Thanks in advance