Damn, snoop beat me to it.

E-series where what came to become the D-series. The first D series engines, the D15A and the D13A, where mechanically identical to the EW and EV engines.

You guys need to learn your Honda history.

For engine series, there are:
A, B, C, D, E, F, G, H, J, and K, and those are just the ones I know about.