Project "Rainbow"

"Rainbow" was a codename for create a new Operating System for replace to JaguarOS. It development was started on earlier 1996 and was cancelled on December 1998, because Development problems.

Versions

 * 1) "Rainbow" Pre-Developer Preview (March 1996)
 * 2) "Rainbow" Developer Preview (September 1996)
 * 3) "Rainbow" Interim Developer Preview (May 1997)
 * 4) "Rainbow" Developer Preview 2 (July 1997)
 * 5) "Rainbow" Developer Preview 3 (February 1998)
 * 6) "Rainbow" Developer Preview 4 (August 1998)

Cancelled Beta version
On late 1998, before the cancellation of "Rainbow", Sony planificates the Beta version of "Rainbow" for April 1999, but because the cancellation of "Rainbow", the Beta version of "Rainbow" was cancelled

Project "Water" (Actually WaterOS)
On February 1999, Sony planificates a new project with the codename "Water", this project will be a new Operating System with all "Rainbow" new features, but with more stability and without any crashes. On 2001 Sony confirms that the final and commercial name of "Water" will is WaterOS.