Serial and parallel


Official Hypello of ModRetro
This is sad, but I still dont know the difference between serial and parallel. If there is a link, give it to me, thanks.
Not to be a grammar nazi, but please remember when talking about it, it's series not serial. Serial is something different.
I'm not exactly sure, also, thanks for fixing that grammar bit, could have made me look really stupid if I made a portable and kept saying the wrong thing.