After all, the only band identification on Led Zeppelin IV (1971) was a series of symbols — one for each group member. In fact, it’s not quite correct to refer to the album as Led Zeppelin IV.

Page designed his symbol, the most complex-looking and one that fans assumed spelled something. “A lot of people mistook it for the word ZoSo," Page explained in The Making of Led Zeppelin’s IV." ...

The Led Zeppelin symbols are probably one of the most recognizable band logos in rock ‘n’ roll. Before the release of their fourth album, known as Led Zepplin IV, the band felt some pressure ...

In 1971 Led Zeppelin gave their fourth album an unpronounceable title made up of four distinct symbols, and Jimmy Page still isn't talking ...

Denny got her own symbol on the ‘Led Zeppelin IV’ inner sleeve John Bonham, Robert Plant, Sandy Denny, and Jimmy Page pose together in September 1970. | Daily Mirror/Mirrorpix via Getty Images) ...