Your comment has reminded me of an office mate from my university days. Most of us type in an obviously sequential manner and you can almost imagine our finger

Your comment has reminded me of an office mate from my university days. Most of us type in an obviously sequential manner and you can almost imagine our fingers being the striking arms of an old, mechanical typewriter, flinging out one at a time to strike a letter. Some go faster or slower, but it seems like the same process at different speeds. He typed like a line-printer, somehow rolling his hands up and down the keyboard and bashing out what looked and sounded like whole lines of text in a single pulse. It was as if he had a chording system for whole phrases, and his arm and hand movements would almost remind you of a concert pianist's.