Rewind is an online radio station that does exactly what its name promises: it turns the clock back with a continuous stream of hits from earlier decades. Aimed at listeners who prefer the music of the past to today's charts, its playlists roam across the classic pop and rock of the 1970s, 1980s and beyond, mixing well-loved anthems with tracks that have slipped from regular rotation elsewhere. As an internet-only service it is available anywhere, at any hour, without presenters or news interruptions. It belongs to the new generation of single-format digital stations built around a single, simple idea: nostalgia, on demand.