Using a pen, in contrast to the past because, in the past, using a feather dipped in ink, written on paper, but there are currently developing a pen to write it instead of feather.
Using the pen contrast with the past In the past, used the feather dipped in ink on paper. But today it has developed a writing pen instead of feathers.
the pen in contrast to the past. Because in the past the feather dipped in ink on paper. But, in the present development of the pen to write down instead of feather