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." ...

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.

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

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 ...