Linux is also different to the closed source operating system vendors in that the software is distributed by many different companies. Major Linux distributions include [http://www.redhat.com/ Red Hat], [http://www.novell.com/linux/ SUSE], [http://www.debian.org/ Debian] and [http://www.ubuntu.com/ Ubuntu]. There are literally hundreds of Linux distributions as can be seen on [http://distrowatch.com DistroWatch.com].
Numerous sources<ref>[http://blogs.zdnet.com/open-source/index.php?p=210 Intellectual Property - Left?]</ref> <ref>[http://www.flickr.com/photos/daviderickson/718933691/]</ref>, including Steve BalmerBallmer<ref>[http://www.theregister.co.uk/2000/07/31/ms_ballmer_linux_is_communism/ MS' Ballmer: Linux is communism]</ref>, one of the driving minds behind the success of Microsoft, have claimed that the Open Source movement is inherently Communist. Both Open Source and Communism shun the idea of personal property, instead favoring a communal ownership where no single entity has control or authority.
In 2005 [http://www.forbes.com/ Forbes.com] posted [http://www.forbes.com/2005/03/15/cz_dl_0315linux_print.html an article] estimating Linux ran 60% of the world's top supercomputers at that time. In 2003 the [[IBM]] Linux Technology Center [http://www.ibm.com/developerworks/library/l-rel/?ca=dgr-lnxw01LTP concluded] that Linux has enterprise class reliability. Linux servers can run without reboot for years as can usually be seen at the [http://uptime.netcraft.com/up/today/top.avg.html Longest uptimes] URL on [http://www.netcraft.com/ Netcraft.com]. Another location to check on Linux uptime statistics is the [http://counter.li.org/reports/uptimestats.php Machine uptimes] page at [http://counter.li.org/ Linux Counter].