Originally Posted by
fredc84
Okay, looked all over but can't find the definition, so....what does "4d" stand for? As in.."Applied via 4d last night".
I bet it's something very obvious I'm too blind to see.
Have you read the Wiki?
4d is one of the links listed. It is not at all important as all links work and cards from all links are seemingly converted to WE in due course.