[Gremlin]

I have had a Hard Drive recorder linked to my TV for at least two years and I can watch a program and have a small box in the corner showing another, then if I want I press a button and switch over.
It is a twin tuner and can record two different programs at the same time. The TV is digital so I could watch one program and record two others.
I am not a lover of TV so I very rarely use it. Just another gadgy I fancied at the time.