Corel Linux, also called Corel LinuxOS, was a Debian-based operating system made by Corel that began beta testing on September 21, 1999 and was released to the public on November 15, 1999. It mainly competed against Windows 98 and Windows 2000 by Microsoft, plus Mac OS 9 by Apple. Corel later discontinued the distribution, but did not remove the former Corel Open Source Development website until March 2002.Corel did not use KFM, the standard KDE file manager.