If you are referring to a specific article or paper discussing the legality or history of this software (often called "abandonware"), the entry on the Archive usually includes a "Legal" note stating that the item is preserved for historical purposes, though Adobe retains the copyright.
By preserving and making Adobe Photoshop 7.0 accessible, the Internet Archive provided a valuable resource for: adobe photoshop 7.0 internet archive 3 may 2017
Reclaiming a Legend: Adobe Photoshop 7.0 and the Internet Archive If you are referring to a specific article