As I like to say about so many things, "The Vim is large, and I'm so very small." Been using Vim, or vi since the eighties, and I didn't know there was any kind

As I like to say about so many things, "The Vim is large, and I'm so very small." Been using Vim, or vi since the eighties, and I didn't know there was any kind of auto/omnicomplete. Or maybe I knew and forgot. I forget.