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===Origins===
[[Acorn Computers]]' Unix variant, [[RISC iX]], was supplied as the primary operating system for its R140 workstation released in 1989.<ref name="acornuser198912">{{cite magazine | url=https://archive.org/details/AcornUser089-Dec89/page/n67/mode/2up | magazine=Acorn User | title=Power to the People | last1=Cox | first1=James | date=December 1989 | access-date=6 September 2020 | pages=66-67,69,71}}</ref> RISC iX provided support for demand paging of compressed executable files. However, the principal motivation for providing compressed executable files was to accommodate a complete Unix system in a hard disk of relatively modest size. Compressed data was not paged out to disk under this scheme.<ref name="taunton1991">{{cite
Paul R. Wilson proposed compressed caching of virtual memory pages in 1990, in a paper circulated at the ACM OOPSLA/ECOOP '90 Workshop on Garbage Collection ("Some Issues and Strategies in Heap Management and Memory Hierarchies"), and appearing in ACM SIGPLAN Notices in January 1991.<ref name ="WilsonIssuesStrategies"/>
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<ref name="CaseForCompressedCaching">{{cite conference |url=https://www.usenix.org/legacy/event/usenix99/full_papers/wilson/wilson.pdf |title=The Case for Compressed Caching in Virtual Memory Systems |author-last1=Wilson |author-first1=Paul R. |author-last2=Kaplan |author-first2=Scott F. |author-last3=Smaragdakis |author-first3=Yannis |date= 1999-06-06 |conference=USENIX Annual Technical Conference |___location=Monterey, California, USA |pages=101–116}}</ref>
<ref name="SIMPSON">{{cite web |author-last=Simpson |author-first=Matthew |title=Analysis of Compression Algorithms for Program Data |date=2014 |url=http://www.ece.umd.edu/~barua/matt-compress-tr.pdf |access-date=2015-01-09 |pages=4-14}}</ref>
<ref name="RIZZO">{{cite journal |author-last=Rizzo |author-first=Luigi |title=A very fast algorithm for RAM compression |journal=ACM SIGOPS Operating Systems Review |date=1996 |volume=31 |issue=2 |url=http://dl.acm.org/citation.cfm?id=250012 |access-date=2015-01-09 |page=8|doi=10.1145/250007.250012 |s2cid=18563587 |url-access=subscription }}</ref>
<ref name="DENNING">{{cite journal |author-last=Denning |author-first=Peter J. |title=Thrashing: Its causes and prevention |journal=Proceedings AFIPS, Fall Joint Computer Conference |date=1968 |url=http://www.cs.uwaterloo.ca/~brecht/courses/702/Possible-Readings/vm-and-gc/thrashing-denning-afips-1968.pdf |access-date=2015-01-05 |page=918 |volume=33}}</ref>
<ref name="FREEDMAN">{{cite web |author-last=Freedman |author-first=Michael J. |title=The Compression Cache: Virtual Memory Compression for Handheld Computers |url=http://www.cs.princeton.edu/~mfreed//docs/6.033/compression.pdf |date=2000-03-16 |access-date=2015-01-09}}</ref>
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<ref name="SoftRAM">{{cite journal |url=https://books.google.com/books?id=XcEKP0ml18EC&pg=PA34 |title=SoftRAM Under Scruitny |journal=[[PC Magazine]] |date=1996-01-23 |access-date=2015-01-01}}</ref>
<ref name="IBM-MXT-PERF">{{cite web |url=http://www.kkant.net/papers/caecw.doc |title=An Evaluation of Memory Compression Alternatives |author-first=Krishna |author-last=Kant |publisher=[[Intel Corporation]] |date=2003-02-01 |access-date=2015-01-01}}</ref>
<ref name="IBM-MXT-NEWS">{{cite web |url=http://www-03.ibm.com/press/us/en/pressrelease/1653.wss |archive-url=https://web.archive.org/web/20130622050529/http://www-03.ibm.com/press/us/en/pressrelease/1653.wss |url-status=dead |archive-date=22 June 2013 |title=IBM Research Breakthrough Doubles Computer Memory Capacity |publisher=[[IBM]] |date=2000-06-26 |access-date=2015-01-01}}</ref>
<ref name="IBM-MXT-PAPERS">{{cite web |url=http://researcher.watson.ibm.com/researcher/view_group_pubs.php?grp=2917 |title=Memory eXpansion Technologies |publisher=[[IBM]] |access-date=2015-01-01}}</ref>
<ref name="zswap-bench">{{cite web |url=https://events.linuxfoundation.org/sites/events/files/slides/tmc_sjennings_linuxcon2013.pdf |title=Transparent Memory Compression in Linux |author-first=Seth |author-last=Jennings |website=linuxfoundation.org |access-date=2015-01-01 |archive-date=2015-01-04 |archive-url=https://web.archive.org/web/20150104214723/https://events.linuxfoundation.org/sites/events/files/slides/tmc_sjennings_linuxcon2013.pdf |url-status=dead }}</ref>
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<ref name="Arstechnica">{{Cite web|url=https://arstechnica.com/apple/2013/10/os-x-10-9/17/#compressed-memory|title=OS X 10.9 Mavericks: The Ars Technica Review|date=22 October 2013}}</ref>
<ref name="Willson_Usenix">{{Cite web|url=https://www.usenix.org/legacy/publications/library/proceedings/usenix01/cfp/wilson/wilson_html/acc.html|title = The Case for Compressed Caching in Virtual Memory Systems}}</ref>
<ref name="Aul_2015">{{cite web |author-last=Aul |author-first=Gabe |url=
<ref name="Paul_1997_NWDOSTIP">{{cite book |title=NWDOS-TIPs — Tips & Tricks rund um Novell DOS 7, mit Blick auf undokumentierte Details, Bugs und Workarounds |chapter=Kapitel II.18. Mit STACKER Hauptspeicher 'virtuell' verdoppeln… |language=de |trans-title=NWDOS-TIPs — Tips & tricks for Novell DOS 7, with a focus on undocumented details, bugs and workarounds |trans-chapter=Utilizing STACKER to 'virtually' double main memory… |author-first=Matthias R. |author-last=Paul |date=1997-07-30 |orig-year=1996-04-14 |edition=3 |version=Release 157 |url=http://www.antonis.de/dos/dos-tuts/mpdostip/html/nwdostip.htm |access-date=2012-01-11 |url-status=live |archive-url=https://web.archive.org/web/20161105172944/http://www.antonis.de/dos/dos-tuts/mpdostip/html/nwdostip.htm |archive-date=2016-11-05}}</ref>
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