Searching for "Adobe Photoshop CS9.0" can be confusing because as a named version. The Photoshop "CS" (Creative Suite) series ended with version CS6.
Since there was a CS6, users often search for subsequent numbers like CS7, CS8, or CS9. However, Adobe jumped straight from CS6 to Photoshop CC. 2. Features of Photoshop 9.0 (CS2) adobe photoshop cs9 0 free download
Allowed users to scale and transform images without losing quality. Searching for "Adobe Photoshop CS9