After the Macintosh came out, it took them one year to write GEOS for the Commodore 64 to do some of the same things a $4000 Macintosh could do on a sub$500 Commodore 64 and 1541 drive.<p>It was the Commodore 64C that came bundled with GEOS.<p>They had a Commodore 128 version and a Commodore 16&#x2F;Plus4 version of GEOS as well.<p>They also ported it to the Apple II series.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;GEOS_(8-bit_operating_system)" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;GEOS_(8-bit_operating_system)</a>