Internally, Photoshop versions continued sequentially. For example, Photoshop CS2 was officially version 9.0 .
While there is no "CS9," the name often surfaces due to technical naming conventions or confusion with consumer-level products: adobe photoshop cs9 exclusive
Adobe Photoshop CS9 does not exist as a standalone commercial release. Adobe officially discontinued the Creative Suite (CS) brand in with the launch of the Adobe Creative Cloud (CC), making Photoshop CS6 (version 13.0) the final version in the "CS" lineage. Internally, Photoshop versions continued sequentially