Editing Kronos (computer) (section)

===Operating system===
{{Infobox OS
| name = Excelsior
| logo = <!-- Filename only: no wikilink, Image: or File: -->
| logo size = 
| logo caption = 
| logo alt = 
| screenshot = <!-- Filename only: no wikilink, Image: or File: -->
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| developer = Kronos Research Group (KRG)
| family = 
| working state = Discontinued
| source model = [[Proprietary software|proprietary]]
| released = {{Start date and age|1988}}<!-- If known, add |mm|dd|df=yes -->
| discontinued = Yes
| latest release version = 
| latest release date = <!-- {{Start date and age|199y|mm|dd|df=yes}} -->
| marketing target = Research
| programmed in = [[Modula-2]]
| language = Russian
| update model = Compile from [[source code]]
| package manager = Modula-2 modules
| supported platforms = Kronos
| kernel type = [[Modular programming|Modular]]
| userland = 
| ui = 
| license = 
| preceded by = [[Lilith (computer)#Operating system|Medos-2]]
| website = {{URL|www.kronos.ru/literature/processors}}
| other articles = 
}}
The Kronos workstation includes an [[operating system]] named ''Excelsior'', developed by the Kronos Research Group (KRG). It is a single user system based on Modula-2 modules.<ref name="Kronos-Excelsior">{{Cite web |last1=Kuznetsov |first1=D.N. |last2=Nedorya |first2=A.E. |last3=Tarasov |first3=E.V. |last4=Filippov |first4=V.E. |date=<!-- Undated --> |title=Kronos: a family of processors for high-level languages |url=http://www.kronos.ru/literature/processors |website=Kronos: History of a Project |publisher=xTech |language=ru |access-date=13 April 2021}}</ref>

In design, it is similar to the OS ''[[Lilith (computer)#Operating system|Medos-2]]'', developed for the Lilith workstation, at ETH Zurich, by Svend Erik Knudsen with advice from Niklaus Wirth.<ref>
{{Cite thesis |last=Knudsen |first=Svend Erik |date=1983 |title=Medos-2: A Modula-2 Oriented Operating System for the Personal Computer Lilith |type=PhD |publisher=[[ETH Zurich]] |doi=10.3929/ethz-a-000300091}}<!-- also at http://e-collection.library.ethz.ch/eserv/eth:21975/eth-21975-02.pdf --></ref><ref>
{{Cite book |last=Knudsen |first=Svend Erik |date=25 October 2000 |chapter=Medos in Retrospect |editor1-last=Böszörményi |editor1-first=László |editor2-last=Gutknecht |editor2-first=Jürg |editor2-link=Jürg Gutknecht |editor3-last=Pomberger |editor3-first=Gustav |title=The School of Niklaus Wirth: The Art of Simplicity |pages=69–86 |publisher=Morgan Kaufmann |isbn=978-1558607231}} {{ISBN|1-55860-723-4}} & dpunkt, {{ISBN|3-932588-85-1}}.</ref>