Cex is a musical project helmed by Rjyan Claybrook Kidwell and started in 1998 at the age of 16. Although Cex and Kidwell are frequently used interchangeably, Cex occasionally expands to several people at sporadic points, such as particular tours or albums. In the past it has included Kidwell's musical associates, friends, touring partners, or high school bandmates.
The first Cex album, Cells, was a compilation of tracks Kidwell had been working on for several years, and was released in 1998 by his own CD-R label, _underscore, while he was still at Dulaney High School in Timonium, Maryland. The following year, Kidwell met Miguel Depedro (Kid 606) and the two founded Tigerbeat6, a record label which would be among the vanguards of the electronica movement at the time. The next Cex album, Role Model, was one of the label's first releases (2000), and was quickly followed up the next year with Oops, I Did It Again!. Oops not only took its title from the Britney Spears album of the same name, but played around with the title by depicting photos of the aftermath of a murder on the cover art.