Caldera Systems, based in Utah, was founded in 1998 by Ransom Love, and received start-up funding from Ray Noorda. Its main product was Caldera Linux, a Linux distribution mainly targeted at business customers and containing some proprietary additions. In 2000, Caldera acquired several UNIX properties from the Santa Cruz Operation, including SCO UNIX and UnixWare, proprietary operating systems for PCs that would be expected to compete directly with Linux.
In 2002, Caldera joined with SuSE Linux, Turbolinux and Conectiva to form United Linux in an attempt to standardize Linux distributions. Later that year, Ransom Love left the company. Caldera's management recognized that the majority of its profits were coming from the legacy SCO flavor of UNIX, and renamed the company to SCO Group. (The company is not related to the former Santa Cruz Operation, now called Tarantella, other than in its purchase of 2 of 3 business groups from the former SCO and 2002 composition of mostly SCO former employees.)
In January of 2003, SCO retained lawyer David Boies, announcing that they would be investigating infringement on their intellectual property pertaining to their ownership of UNIX. On March 7, CEO Darl McBride announced that they were suing IBM over its contributions to Linux, claiming that IBM stole UNIX trade secrets and gave them to Linux kernel developers. See the article SCO v. IBM Linux lawsuit for more details on this. As a result of this lawsuit, SuSE Linux has publicly stated that they are reevaluating their ties to SCO. The stock price of SCO has increased over 1500% since filing the suit.
In May 2003, the SCO Group claimed they sent letters to 1,500 of the world's largest corporations, including the Fortune 500 companies, alleging that the use of Linux may infringe a copyright they hold on the original UNIX source code. They claim that the Linux kernel, the core of the operating system contains copyrighted SCO source code. As a result, the SCO Group was sued for defamation by a number of parties including IBM, the German LinuxTag organisation and Linux vendors SuSE and Red Hat. In Germany and some other countries, the SCO Group accepted a court order to abstain from making claims against Linux, whereas the legal cases in the United States are still unresolved.
In June 2003, the SCO Group acquired Vultus Inc, for an undisclosed amount. Vultus Inc was previously a member property acting under the Canopy Group umbrella. The SCO Group and the Canopy Group also own a small amount (1.6% and 4.1%) of shares in Trolltech, creator of the Qt libaries. The Canopy Group is an operating company of other technological companies, including a Linux clustering company Linux Networx. It owns 46% of the SCO Group; the two corporations share several executives.
Today, the SCO Group outwardly seems to be having much financial difficulty. Some analysts claim that its lawsuit with IBM and its aggressive campaign against Linux stems from this difficulty. The SCO Group denies that it is attacking Linux, citing the fact that they produced their own OpenLinux distribution of Linux.