Probably on the path to scan codes. By using scan codes, they could abstract what a particular key meant and thereby remap the keys so that they didn't have to

Probably on the path to scan codes. By using scan codes, they could abstract what a particular key meant and thereby remap the keys so that they didn't have to match the ASCII table layout. I still don't understand why we evolved scan codes the way we did. This requires the OS to be in sync to be able to map them back.