Integrated Software for Imagers and Spectrometers (ISIS) is used by USGS Astrogeology to process planetary image data.
If you are looking to download or use this file from an archival site: Isis-1.02-pc.zip
"ISIS-II" was an early operating system for Intel development systems; emulators like Thames allow these applications to run on modern PCs. Integrated Software for Imagers and Spectrometers (ISIS) is