Editing UNICOS (section)

== Releases ==
Cray released several different OSs under the name UNICOS, including:
#''UNICOS'': the original Cray Unix, based on System V. Used on the [[Cray-1]], [[Cray-2]], [[Cray X-MP|X-MP]], [[Cray Y-MP|Y-MP]], [[Cray C90|C90]], etc.
#''UNICOS MAX'': a [[Mach kernel|Mach]]-based [[microkernel]] used on the [[Cray T3D|T3D]]'s processing elements, together with UNICOS on the host Y-MP or C90 system.
#''UNICOS/mk'': a ''serverized'' version of UNICOS using the [[ChorusOS|Chorus]] [[microkernel]] to make a [[distributed operating system]]. Used on the [[Cray T3E|T3E]]. This was the last Cray OS really based on UNICOS sources, as the following products were based on different sources and simply used the "UNICOS" name.
#''UNICOS/mp'': not derived from UNICOS, but based on [[IRIX]] 6.5. Used on the [[Cray X1|X1]].
#''UNICOS/lc'': not derived from UNICOS, but based on [[SUSE Linux]]. Used on the [[Cray XT3|XT3]], [[Cray XT4|XT4]] and [[Cray XT5|XT5]]. UNICOS/lc 1.x comprises a combination of
##the compute elements run the [[Catamount (operating system)|Catamount]] microkernel (which itself is based on [[Cougaar]])
##the service elements run SUSE Linux
#''Cray Linux Environment'' (CLE): from release 2.1 onward, UNICOS/lc is now called Cray Linux Environment
##the compute elements run [[Compute Node Linux]] (CNL) (which is a customized [[Linux kernel]]<ref>{{cite web|url=https://cug.org/5-publications/proceedings_attendee_lists/2007CD/S07_Proceedings/pages/Authors/Wallace-7C/Wallace-7C-paper.pdf |archive-url=https://web.archive.org/web/20160305014832/http://cug.org/5-publications/proceedings_attendee_lists/2007cd/s07_proceedings/pages/authors/wallace-7c/wallace-7c-paper.pdf |archive-date=2016-03-05 |url-status=live|title=Cray XT3/XT4 Software: Status and Plans|last=Wallace|first=David|date=2007-05-05|work=CUG 2007 Proceedings|publisher=Cray User Group|access-date=2012-12-18}}</ref>)
##the service elements run [[SUSE Linux Enterprise Server]]