ABBA is one of the most successful pop groups of all time, consisting of Agnetha Fältskog, Björn Ulvaeus, Benny Andersson, and Anni-Frid Lyngstad. The name 'ABBA' is an acronym formed by the first initials of the four members' names. However, when they first decided to use the name in 1973, they realized it was already the name of a famous Swedish fish-canning company (Abba Seafood). The band actually had to contact the company to ask for permission to use the name. The company agreed, provided the band didn't do anything to make the brand look bad. Interestingly, in their early promotional photos, the first 'B' in ABBA was sometimes written backwards to create the iconic logo, which was officially trademarked in 1976.