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<title>RISCOS Ltd.</title>

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</style><div role="note" class="hatnote navigation-not-searchable">This article is about the company. For the operating system, see <a href="RISC_OS" title="RISC OS">RISC OS</a>.</div>

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</style><table class="infobox ib-company vcard"><caption class="infobox-title fn org" style="font-size: 125%;">RISCOS Ltd.</caption><tbody><tr><td colspan="2" class="infobox-image ib-company-logo logo"><span typeof="mw:File"></span></td></tr><tr><th scope="row" class="infobox-label">Company type</th><td class="infobox-data category"><a href="Privately_held_company" title="Privately held company">Private</a></td></tr><tr><th scope="row" class="infobox-label">Industry</th><td class="infobox-data category"><a href="Computer_software" class="mw-redirect" title="Computer software">Computer software</a></td></tr><tr><th scope="row" class="infobox-label">Founded</th><td class="infobox-data">January 7, 1999<span style="display:none"> (<span class="bday dtstart published updated">1999-01-07</span>)</span>, in <a href="Cardiff" title="Cardiff">Cardiff</a>, UK</td></tr><tr><th scope="row" class="infobox-label">Founder</th><td class="infobox-data agent">Paul Middleton</td></tr><tr><th scope="row" class="infobox-label">Defunct</th><td class="infobox-data">May 14, 2013<span style="display: none;"> (<span class="dtend itvend">2013-05-14</span>)</span></td></tr><tr><th scope="row" class="infobox-label">Fate</th><td class="infobox-data">Dissolved</td></tr><tr><th scope="row" class="infobox-label">Headquarters</th><td class="infobox-data adr"><div class="ib-company-locality locality"><a href="Cardiff" title="Cardiff">Cardiff</a></div>, <div class="ib-company-country country-name">UK</div></td></tr><tr><th scope="row" class="infobox-label"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Area served</div></th><td class="infobox-data">Worldwide</td></tr><tr><th scope="row" class="infobox-label"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Key people</div></th><td class="infobox-data agent">Paul Middleton (<a href="Chief_executive_officer" title="Chief executive officer">CEO</a>)</td></tr><tr><th scope="row" class="infobox-label">Products</th><td class="infobox-data"><a href="RISC_OS" title="RISC OS">RISC OS 4, RISC OS 6</a></td></tr><tr><th scope="row" class="infobox-label">Services</th><td class="infobox-data category"><a href="Information_technology_consulting" title="Information technology consulting">IT consulting</a></td></tr><tr><th scope="row" class="infobox-label">Website</th><td class="infobox-data"><span class="url"><a rel="nofollow" class="external text" href="http://riscos.com">riscos<wbr>.com</a></span> (before 2013-03-04)</td></tr></tbody></table>

<p><b>RISCOS Ltd.</b> (also referred to as <b>ROL</b>) was a <a href="Private_company_limited_by_guarantee" class="mw-redirect" title="Private company limited by guarantee">limited company</a> engaged in <a href="Computer_software" class="mw-redirect" title="Computer software">computer software</a> and <a href="IT_consulting" class="mw-redirect" title="IT consulting">IT consulting</a>. It licensed the rights to continue the development of <span class="nowraplinks"><a href="RISC_OS" title="RISC OS">RISC OS 4</a></span> and to distribute it for desktop machines (as an upgrade or for new machines) from <a href="Element_14_(company)" class="mw-redirect" title="Element 14 (company)">Element 14</a><sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> and subsequently <a href="Pace_Micro_Technology" class="mw-redirect" title="Pace Micro Technology">Pace Micro Technology</a>.<sup id="cite_ref-pcw_clark_1999_3-0" class="reference"><a href="#cite_note-pcw_clark_1999-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Company founders include developers who formerly worked within Acorn's dealership network. It was established as a <a href="Nonprofit_company" class="mw-redirect" title="Nonprofit company">nonprofit company</a>.<sup id="cite_ref-pcw_clark_1999_3-1" class="reference"><a href="#cite_note-pcw_clark_1999-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> On or before 4 March 2013 3QD Developments acquired RISCOS Ltd's flavour of RISC OS.<sup id="cite_ref-iconbar-2013-03-07_4-0" class="reference"><a href="#cite_note-iconbar-2013-03-07-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> RISCOS Ltd was dissolved on 14 May 2013.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup>

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<div class="mw-heading mw-heading2"><h2 id="History">History</h2></div>

<p>RISCOS Ltd was formed to continue end-user-focused development of RISC OS after the de-listing of <a href="Acorn_Computers" title="Acorn Computers">Acorn Computers</a>, following its purchase by <a href="Morgan_Stanley_Dean_Witter" class="mw-redirect" title="Morgan Stanley Dean Witter">Morgan Stanley Dean Witter</a> in order to benefit from the shareholding that Acorn held in <a href="ARM_Ltd" class="mw-redirect" title="ARM Ltd">ARM Ltd</a>. In March 1999, RISCOS Ltd obtained exclusive rights to develop and sell RISC OS 4 for the desktop market from Element 14. A few weeks later Pace purchased Acorn's Cambridge headquarters and staff for £200,000 and then continued to develop its own, in-house version of RISC OS, primarily for <a href="Set-top_box" title="Set-top box">set-top boxes</a> and other embedded devices.

</p><p>At the time of the company's formation, it was noted that having access to the source code could facilitate removal of the OS's dependence on Acorn's proprietary chips. This simplifies entry to the hardware market by new companies.<sup id="cite_ref-guardian_computerwatch_7-0" class="reference"><a href="#cite_note-guardian_computerwatch-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup>

</p><p>On 29 January and 14 May 2013 RISCOS Ltd was listed in the <a href="London_Gazette" class="mw-redirect" title="London Gazette">London Gazette</a>: on 14 May 2013 it was struck from the register of companies and dissolved.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> The rights to all versions of RISC OS previously developed and marketed by RISCOS Ltd were purchased by 3QD Developments Ltd, the maker of <a href="VirtualAcorn" title="VirtualAcorn">VirtualAcorn</a>.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup>

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<div class="mw-heading mw-heading2"><h2 id="Products">Products</h2></div>

<p>RISCOS Ltd completed work on <i>RISC OS 4</i> and in July 1999 it was released as an upgrade for existing machines, priced at £120.<sup id="cite_ref-pcw_outlive_10-0" class="reference"><a href="#cite_note-pcw_outlive-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> Improvements include support for long filenames, larger disk sizes and partitions, along with a new desktop look.<sup id="cite_ref-pcw_outlive_10-1" class="reference"><a href="#cite_note-pcw_outlive-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup>

</p><p>Work then continued on a system of soft-loaded updated versions of the OS, released under an annual subscription release scheme named <i>RISC OS Select</i> in 2002.

</p>

<p>In 2004, the company replaced its baseline RISC OS 4.02 product with an updated version of the OS named <i>RISC OS Adjust</i>. This version of RISC OS was based on version 4.39, or <i>Select Edition 3 Issue 4</i>, of the company's Select scheme. In the same year, RISCOS Ltd agreed to produce a fully 32-bit-compatible version of RISC OS Adjust for Advantage Six's <a href="A9home" title="A9home">A9home</a> product. The A9home was released in May 2006 after a 12-month beta-testing process, although the build of Adjust 32, namely RISC OS 4.42, is not feature-complete.

</p>

<p>In October 2006, a beta-version of RISC OS Six was made available for download by subscribers to the Select scheme.<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> RISC OS Six represents the next generation of RISCOS Ltd's stream of the operating system. Significant <a href="Software_portability" title="Software portability">portability</a>, stability and internal structure improvements, including full 26/32-bit neutrality, have laid the foundations for the company's future releases, all of which will be based on version 6. The first product to be based on RISC OS Six will be <i>Select Edition 4</i>. RISC OS Six is 32-bit-neutral and can be built to run in either 26-bit or 32-bit modes. It runs on the <a href="Risc_PC" title="Risc PC">Risc PC</a> and A9home, but it doesn't run on newer-generation hardware such as the <a href="Iyonix_PC" title="Iyonix PC">Iyonix PC</a> and ARMini, which do not support the 26-bit addressing used on the older Acorn computers and require specific hardware support for the newer ARMv5 and ARMv7 architecture chips that they use.

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<div class="mw-heading mw-heading3"><h3 id="Licensed_emulation">Licensed emulation</h3></div>

<p>In 2003, the company reached an agreement with <a href="VirtualAcorn" title="VirtualAcorn">VirtualAcorn</a> to license its OS for use with <a href="Emulator" title="Emulator">emulators</a>.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup>

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<div class="mw-heading mw-heading3"><h3 id="Potential_ports">Potential ports</h3></div>

<p>In 1999, the company announced plans to port the OS to machines such as the <a href="Jornada_(PDA)" class="mw-redirect" title="Jornada (PDA)">Jornada</a> <a href="Sub-notebook" class="mw-redirect" title="Sub-notebook">sub-notebook</a>.<sup id="cite_ref-acornuser_1999xmas_13-0" class="reference"><a href="#cite_note-acornuser_1999xmas-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> A number of planned ports did not come to fruition.

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<div class="mw-heading mw-heading2"><h2 id="Licence_dispute">Licence dispute</h2></div>

<p>In November 2002 <a href="Castle_Technology_Ltd" class="mw-redirect" title="Castle Technology Ltd">Castle Technology Ltd</a> released a modified version of Pace's <a href="32-bit" class="mw-redirect" title="32-bit">32-bit</a> RISC OS as <i>RISC OS 5</i> for their <a href="Iyonix_PC" title="Iyonix PC">Iyonix PC</a>, in apparent contravention of the licence agreement that RISCOS Ltd held with Element 14. In July 2003, Castle bought all technology rights to RISC OS from Pace in an attempt to legalise the situation. In January 2004, Castle also took over Tematic Ltd., the company formed by ex-Pace engineers when they were made redundant in March 2003. The result was a long-running and acrimonious dispute between RISCOS Ltd and Castle over licensing, which ultimately led to Castle claiming to terminate RISCOS Ltd's licence to develop, sell and sub-license RISC OS 4. RISCOS Ltd refuted all the claims made and challenged Castle to identify how and from whom they had acquired RISC OS 5.<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> An end to the dispute was signalled when RISCOS Ltd and Castle agreed to work on attempting to merge their development streams and re-unify RISC OS, with Castle's engineers working on key system functionality and RISCOS Ltd on user-facing elements.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> One of the conditions was that RISCOS Ltd agreed to be renamed <b>RISC OS Developments Ltd.</b> ROL and Castle subsequently agreed to merge <span class="nowrap">RISC OS 4</span> and <span class="nowrap">RISC OS 5</span> together,<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> this merge nor the name change did not happen before the dissolution of RISCOS Ltd.

</p><p>RISCOS Ltd considered taking legal action in 2008 to prevent <a href="RISC_OS_Open" title="RISC OS Open">RISC OS Open</a> from releasing a RiscPC compatible <a href="ROM_image" title="ROM image">ROM image</a>.<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup>

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<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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</style><cite id="CITEREFMagee1999" class="citation web cs1">Magee, Mike (1999-03-06). <a rel="nofollow" class="external text" href="https://www.theregister.co.uk/1999/03/06/riscos_to_continue_os/">"RISCOS to continue OS 4 development"</a>. <i>The Register</i>. <a href="The_Register" title="The Register">The Register</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2011-05-09</span></span>. <q>According to RISCOS Limited, it has gained an exclusive licence from Element 14, formerly Acorn [...]</q></cite></span>

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<li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://acorn.chriswhy.co.uk/AfterAcorn/RISCOSLtd.html">"Chris's Acorns"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">17 May</span> 2013</span>.</cite></span>

</li>

<li id="cite_note-pcw_clark_1999-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-pcw_clark_1999_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-pcw_clark_1999_3-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><cite id="CITEREFClark,_Etelka1999" class="citation news cs1">Clark, Etelka (July 1, 1999). <a rel="nofollow" class="external text" href="https://archive.today/20130420003535/http://www.computeractive.co.uk/pcw/news/1926765/acorn-dies-legacy-lives">"Acorn dies but legacy lives on"</a>. <i><a href="Personal_Computer_World" title="Personal Computer World">Personal Computer World</a></i>. Archived from <a rel="nofollow" class="external text" href="http://www.computeractive.co.uk/pcw/news/1926765/acorn-dies-legacy-lives">the original</a> on April 20, 2013<span class="reference-accessdate">. Retrieved <span class="nowrap">April 10,</span> 2012</span>.</cite></span>

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<li id="cite_note-iconbar-2013-03-07-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-iconbar-2013-03-07_4-0">^</a></b></span> <span class="reference-text"><cite id="CITEREFDuffell,_Andrew2013" class="citation web cs1">Duffell, Andrew (2013-03-07). <a rel="nofollow" class="external text" href="http://iconbar.co.uk/articles/3QD_Developments_acquire_RISC_OS_from_RISCOS_Ltd/index1279.html">"3QD Developments acquire RISC OS from RISCOS Ltd"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2013-03-25</span></span>.</cite></span>

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<li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.riscos.com/contact_details/">"Contact Details - 4/3/2013 onwards"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2013-03-06</span></span>.</cite></span>

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<li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><cite class="citation news cs1"><a rel="nofollow" class="external text" href="http://www.london-gazette.co.uk/issues/824134/supplements/1255">"FIRST GAZETTE NOTICES"</a>. <i><a href="London_Gazette" class="mw-redirect" title="London Gazette">London Gazette</a></i>. 14 May 2013.</cite></span>

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<li id="cite_note-guardian_computerwatch-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-guardian_computerwatch_7-0">^</a></b></span> <span class="reference-text"><cite id="CITEREFSchofield,_Jack1999" class="citation news cs1"><a href="Jack_Schofield_(journalist)" title="Jack Schofield (journalist)">Schofield, Jack</a> (March 11, 1999). <a rel="nofollow" class="external text" href="https://www.theguardian.com/technology/1999/mar/11/onlinesupplement9">"Computerwatch"</a>. <i><a href="The_Guardian" title="The Guardian">The Guardian</a></i><span class="reference-accessdate">. Retrieved <span class="nowrap">February 27,</span> 2012</span>. <q>Riscos Ltd has been formed to complete the development of Acorn's Risc OS 4 operating system [...] Paul Middleton, Riscos's managing director, reckons that, with access to the source code, it should be possible to remove the operating system's dependence on proprietary chips such as the IOMD and VIDC input/output and video chips in Acorn computers. This would make it easier for new companies to enter the hardware market.</q></cite></span>

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<li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><cite class="citation news cs1"><a rel="nofollow" class="external text" href="http://www.london-gazette.co.uk/issues/823984/supplements/1394">"FIRST GAZETTE NOTICES"</a>. <i><a href="London_Gazette" class="mw-redirect" title="London Gazette">London Gazette</a></i>. 29 January 2013.</cite></span>

</li>

<li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text"><cite class="citation news cs1"><a rel="nofollow" class="external text" href="http://riscos.com/news/news_items/3qd_1.htm">"3QD Developments Ltd purchase rights from RISCOS Ltd"</a>. 7 March 2013.</cite></span>

</li>

<li id="cite_note-pcw_outlive-10"><span class="mw-cite-backlink">^ <a href="#cite_ref-pcw_outlive_10-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-pcw_outlive_10-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><cite id="CITEREFClark,_Etelka1999" class="citation news cs1">Clark, Etelka (August 24, 1999). <a rel="nofollow" class="external text" href="http://www.computeractive.co.uk/pcw/news/1920904/risc-os-outlives-acorn">"RISC OS outlives Acorn"</a>. <i><a href="Personal_Computer_World" title="Personal Computer World">Personal Computer World</a></i><span class="reference-accessdate">. Retrieved <span class="nowrap">April 10,</span> 2012</span>.</cite></span>

</li>

<cite id="CITEREFProven2006" class="citation web cs1 cs1-prop-unfit">Proven, Liam (2006-10-20). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20091106005205/http://www.theinquirer.net/inquirer/news/1039769/risc-os-appears-couple-late">"RISC OS six appears, only a couple of years late"</a>. <i>The Inquirer</i>. <a href="The_Inquirer" title="The Inquirer">The Inquirer</a>. Archived from the original on November 6, 2009<span class="reference-accessdate">. Retrieved <span class="nowrap">2011-06-02</span></span>. <q>RISC OS Ltd announced its latest version of the Archimedes and Risc PC operating system: RISC OS Six.</q></cite></span>

</li>

<li id="cite_note-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-12">^</a></b></span> <span class="reference-text"><cite id="CITEREFNaulls2003" class="citation web cs1">Naulls, Peter (2003-09-02). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20110927024634/http://www.drobe.co.uk/riscos/artifact799.html">"Virtual Licence"</a>. <a href="Drobe" title="Drobe">Drobe</a>. Archived from <a rel="nofollow" class="external text" href="http://www.drobe.co.uk/riscos/artifact799.html">the original</a> on 2011-09-27<span class="reference-accessdate">. Retrieved <span class="nowrap">2011-06-27</span></span>. <q>[...] RISCOS Ltd today announced it had reached an agreement with Virtual Acorn regarding licensing of RISC OS 4 for use with Virtual Acorn's emulators.</q></cite></span>

</li>

<li id="cite_note-acornuser_1999xmas-13"><span class="mw-cite-backlink"><b><a href="#cite_ref-acornuser_1999xmas_13-0">^</a></b></span> <span class="reference-text"><cite class="citation news cs1"><a rel="nofollow" class="external text" href="http://audio22.archive.org/details/Acorn_User_Issue_215_1999_IDG_Media_GB_christmas_edition">"Internet portal launched"</a>. <i><a href="Acorn_User" title="Acorn User">Acorn User</a></i>. No. 215. Christmas 1999. p. 6<span class="reference-accessdate">. Retrieved <span class="nowrap">16 August</span> 2013</span>.</cite></span>

</li>

<cite id="CITEREFSmith2004" class="citation web cs1">Smith, Tony (2004-06-17). <a rel="nofollow" class="external text" href="https://www.theregister.co.uk/2004/06/17/riscos_dispute/">"RISC OS rights rumble becomes war of words"</a>. <i>The Register</i>. <a href="The_Register" title="The Register">The Register</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2011-05-09</span></span>.</cite></span>

</li>

<cite id="CITEREFSmith2004" class="citation web cs1">Smith, Tony (2004-07-19). <a rel="nofollow" class="external text" href="https://www.theregister.co.uk/2004/07/19/risc_os_agreement/">"RISC OS rivals reach rapprochement"</a>. <i>The Register</i>. <a href="The_Register" title="The Register">The Register</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2011-05-09</span></span>. <q>However, on Wednesday, 14 July, sub-licensees, RISCOS shareholders, and directors from RISCOS and Castle met to thrash out a peaceful settlement.</q></cite></span>

</li>

<li id="cite_note-16"><span class="mw-cite-backlink"><b><a href="#cite_ref-16">^</a></b></span> <span class="reference-text"><cite id="CITEREFMiddletonLillingston,_Jack2004" class="citation web cs1">Middleton, Paul; Lillingston, Jack (2004-10-15). <a rel="nofollow" class="external text" href="http://www.iconbar.com/pressreleases/?action=show_page&dir=castle&file=0409000000000000">"RISCOS Ltd and Castle Technology Ltd announce new co-operative Agreement on future RISC OS Development"</a>. <a href="Drobe" title="Drobe">Drobe</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2011-06-27</span></span>. <q>The new licence ensures that both RISC OS 4 and RISC OS 5 will be merged together [sic] [...]</q></cite></span>

</li>

<cite id="CITEREFHolwerda2008" class="citation web cs1">Holwerda, Thom (2008-12-10). <a rel="nofollow" class="external text" href="http://www.osnews.com/story/20632/RISCOS_Ltd_Might_Take_Legal_Action_Against_RISC_OS_Open_Ltd">"RISCOS Ltd Might Take Legal Action Against RISC OS Open Ltd"</a>. <i>OSnews</i>. <a href="OSNews" title="OSNews">OSNews</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2011-05-09</span></span>. <q>RISCOS Ltd might take legal action trying to prevent RISC OS Open Ltd from releasing a RiscPC compatible ROM from the RISC OS 5 shared source project.</q></cite></span>

</li>

</ol></div></div>

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</style><div id="Acorn_Computers81" style="font-size:114%;margin:0 4em"><a href="Acorn_Computers" title="Acorn Computers">Acorn Computers</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Operating systems</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Acorn_MOS" title="Acorn MOS">Acorn MOS</a></li>

<li><a href="Panos_(operating_system)" title="Panos (operating system)">Panos</a></li>

<li><a href="Galileo_(operating_system)" title="Galileo (operating system)">Galileo</a></li>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Computers</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">8-bit <a href="Microcomputer" title="Microcomputer">microcomputers</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Acorn_System_1" title="Acorn System 1">Microcomputer</a></li>

<li><a href="Acorn_System" title="Acorn System">Systems 2 to 5</a></li>

<li><a href="BBC_Micro" title="BBC Micro">BBC Micro</a> (Proton)</li>

<li><a href="Acorn_Electron" title="Acorn Electron">Electron</a></li>

<li><a href="Acorn_Communicator" title="Acorn Communicator">Communicator</a></li>

<li><a href="Acorn_Business_Computer" title="Acorn Business Computer">Business Computer</a></li>

<li><a href="BBC_Master" title="BBC Master">BBC Master</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">32-bit <a href="Personal_computer" title="Personal computer">PCs</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Acorn_Archimedes" title="Acorn Archimedes">Archimedes range</a></li>

<li><a href="Acorn_Network_Computer" title="Acorn Network Computer">Network Computer</a></li>

<li><a href="Phoebe_(computer)" title="Phoebe (computer)">Phoebe</a></li></ul>

</div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Derivatives, clones,<br>compatibles</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">8-bit microcomputers</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="BBC_Master#Olivetti_Prodest_PC_128_S" title="BBC Master">Prodest PC 128 S</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">32-bit PCs</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

<li>ARMini (<a href="BeagleBoard-xM" class="mw-redirect" title="BeagleBoard-xM">BeagleBoard-xM</a>)</li>

<li>BIK (<a href="BeagleBoard-xM" class="mw-redirect" title="BeagleBoard-xM">BeagleBoard-xM</a> in Kiste)</li>

<li><a href="MicroDigital_Omega" title="MicroDigital Omega">Omega</a></li>

<li>RiscStation R7500</li>

<li><a href="Iyonix_PC" title="Iyonix PC">Iyonix</a></li>

<li>Titanium</li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">32-bit <a href="Microprocessor_development_board" title="Microprocessor development board">dev boards</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="BeagleBoard" title="BeagleBoard">BeagleBoard</a></li>

<li>DevKit8000</li>

<li><a href="IGEPv2" title="IGEPv2">IGEPv2</a></li>

<li><a href="Pandora_(console)" class="mw-redirect" title="Pandora (console)">Pandora</a></li>

<li><a href="PandaBoard" title="PandaBoard">PandaBoard</a></li>

<li><a href="Raspberry_Pi" title="Raspberry Pi">Raspberry Pi</a></li>

<li><a href="Touch_Book" title="Touch Book">Touch Book</a></li>

</div></td></tr></tbody></table><div></div></td></tr></tbody></table></div>

<div class="navbox-styles"></div><div role="navigation" class="navbox" aria-labelledby="RISC_OS414" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="RISC_OS414" style="font-size:114%;margin:0 4em"><a href="RISC_OS" title="RISC OS">RISC OS</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="2"><div><span class="noviewer" typeof="mw:File"><span title="Category"></span></span> Category: RISC OS software</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Main companies<sup><small>a</small></sup></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Castle_Technology" title="Castle Technology">Castle Technology</a></li>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Hardware</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Acorn_Archimedes" title="Acorn Archimedes">Archimedes series</a></li>

<li><a href="RiscPC" class="mw-redirect" title="RiscPC">RiscPC series</a></li>

<li><a href="Iyonix_PC" title="Iyonix PC">Iyonix</a></li>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Emulation</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Aemulor" title="Aemulor">Aemulor</a></li>

<li><a href="VirtualAcorn" title="VirtualAcorn">VirtualAcorn</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Key software<sup><small>b</small></sup></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="ArtWorks" title="ArtWorks">ArtWorks</a></li>

<li><a href="Impression_(software)" title="Impression (software)">Impression</a></li>

<li><a href="NetSurf" title="NetSurf">NetSurf</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">OS components</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

<li><a href="BBC_BASIC" title="BBC BASIC">BBC BASIC</a></li>

<li><a href="List_of_RISC_OS_bundled_applications" title="List of RISC OS bundled applications">Bundled applications</a></li>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">OS utilities</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="MakeModes" title="MakeModes">MakeModes</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Books</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><i><a href="ARM_system-on-chip_architecture" class="mw-redirect" title="ARM system-on-chip architecture">ARM system-on-chip architecture</a></i></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related and historical</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Acorn_Computers" title="Acorn Computers">Acorn Computers</a></li>

<li><a href="ARM_Holdings" class="mw-redirect" title="ARM Holdings">ARM Holdings</a></li>

<li><a href="Element_14_(company)" class="mw-redirect" title="Element 14 (company)">Element 14</a></li>

<li><a href="Galileo_(operating_system)" title="Galileo (operating system)">Galileo</a></li>

<li><a href="History_of_RISC_OS" title="History of RISC OS">History of RISC OS</a></li>

<li><a href="Phoebe_(computer)" title="Phoebe (computer)">Phoebe</a></li>

<li><a href="RISCOS_Ltd" class="mw-redirect" title="RISCOS Ltd">RISCOS Ltd</a></li>

<li><a href="The_Electronic_Font_Foundry" title="The Electronic Font Foundry">The Electronic Font Foundry</a></li>

</div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div>

<ul><li><sup><small>a</small></sup> Current companies only</li>

<li><sup><small>b</small></sup> Addition of major functionality</li></ul>

</div></td></tr></tbody></table></div></div><div><div class="zim-footer">

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