Adobe Photoshop CS5 Extended (Version 12.0), released in April 2010, marked a transformative milestone in the evolution of digital imaging. As the "Extended" version of the industry standard, it provided a specialized superset of tools for professionals in filmmaking, architecture, and medical research, going beyond traditional photography to embrace 3D design and motion content.
The "Extended" moniker specifically referred to tools used beyond graphic design. In medical and forensic fields, CS5 Extended was used for image analysis and measurement
For researchers, CS5 Extended included rulers, scales, and count tools that could log data points (e.g., cells in a microscope image) automatically to a CSV file.