What is design for screen?

As part of my ongoing research into existing graphic design practice, I shall be documenting a variety of screen based design ranging from programming design through to design for television. As well as keeping these posts tagged under 'OUGD102' I shall be categorising them further into 'GDFS' (Graphic Design For Screen). I'm aiming to establish a well informed and fully linked out directory I can refer back to throughout the course.