A re-usable recorder device is now called a digital recorder
it uses a internal hard drive to record one channel while
you watch another , it simply saves the tv programme to hard drive, allowing you to re-watch at a later time, any time.
there are dual channel digital recorders that record up to two channels.
If you want to record the programme saved then out put to a dvd recorder for permanent dvd back up.
google around for 'DVD recorders with hard drive'.
hi jefro Tivo went bust here in the UK , the big cartel here is Virgin media, Sky and freeview, (maybe setanta euro & their future is in the balance) only one free ;l) a lot of ppl are using the internet subscription sites for the sport channels as sky charge ridiculous amounts for say one boxing match or footy match, ppl use the recorders as the matches are out of UK time zone