join Progeny Linux Systems which was aiming to create a professional Debian. He remained there in the capacity of a board member and advisor until 30 April 2007 when Progeny ceased operations. McBride began to focus on SCO's copyrights. One of McBride's first acts as CEO was to collect $600,000 in back licensing fees that were owed to Caldera International. He cleaned up various Linux-related licensing issues allowing for a new round of financing. Soon thereafter he made strong accusations that Linux had infringed copyrights SCO held on Unix; they claimed to have purchased these copyrights from Novell. Novell denied selling them the Unix copyright, prompting them to sue for slander of title. SCO also initiated lawsuits against IBM and AutoZone, alleging copyright infringements through the use or distribution of Linux; none of these lawsuits have been resolved. SCO has created a division, SCOsource, that owns and licenses their intellectual property; a desktop license is $699. See also Caldera Systems Smallfoot Lineo Embedix Novell SUSE Linux Novell UnixWare Star Trek project Caldera DR-WebSpyder Notes References Further reading Ransom Love on the SCO merger More on finances of the SCO merger Darl McBride's early successes in the IP battles Ransom Love editorial on the value of the Linux Standard Base In addition to the litigation SCO initiated Red Hat has sued SCO December 1995 review of Caldera Desktop Linux A comparative review from seven months later External links Groklaw has an extended discussion of the Linux ABI An advertisement white-paper from March 2001 Red Hat to Caldera. This pushes the "product not a distribution" philosophy. Ralf Flaxa's LST was a major contributor for the original Caldera Desktop Caldera (company) operating systems Discontinued Linux distributions SCO–Linux disputes Linux distributions