AOL used a stripped down version called Geoworks:
<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;GEOS_(16-bit_operating_system)" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;GEOS_(16-bit_operating_system)</a><p>They stopped using it when they stopped supporting DOS and switched to a Windows client. Older AOL for DOS 3.5&quot; floppies can take the Geoworks files out and run them by themselves without the AOL client.