Re: Left padding
Actually Basic was introduced into classes at Dartmouth College 52 years ago, and I suspect that padding a string on the left was something that cropped up in class within the first couple of years of using it as as a teaching language. By the mid-70s it was used all over the place. So I think 40 years ago is more likely than 30, and it 's quite likely that it turned up in a tutorial developed at Dartmouth 50 years ago.