_(ITS | http://www.its.os.org/) (Incompatible Timesharing System) was a famous *(OS) written by hackers at MIT for the DEC PDP-6 and PDP-10 family during the 1960's and 70's. It was famous for being the antithesis of the _(security)-obsessed CTSS (Compatible Time-Sharing System), by being very hackable and so _(user rights) were a matter of social respect and ethics alone, rather than the dictates of the system, which often limited performance and capacity of the system. ITS was driven by the hacker ethic.

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<li>See Also _("A Brief History of Hackerdom - 3. The Early Hackers" | http://www.tuxedo.org/~esr/writings/hacker-history/hacker-history-3.html) by Eric S. Raymond, and
<li>_("Open Sources Voices from the Open Source Revolution - The GNU Operating System and the Free Software Movement - The First Software-Sharing Community" | http://www.sindominio.net/biblioweb/telematica/open-sources-html/node43.html) by Richard Stallman.
<li>or get some detailed information and a login to a running ITS system (is it emulated? Who cares, it runs the web server!) _(here|http://its.svensson.org/).
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