Also the initials of Stock, Aitken, and Waterman, who (while working for PWL) were behind many artists and songs, mostly in the eighties. Examples include Kylie Minogue, Samantha Fox, Cliff Richard...

Aitken left PWL in 1991; Stock and Waterman carried on for a while (with artists such as Sybil, Suzette Charles ... yeah, I've never heard of them either), before Mike Stock also left PWL.

Stock's been having more success recently, with the pop band Steps. Whether it's deserved or not is up to the individual. ;-)