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#interlisp

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The Medley Interlisp Project<p>The Common Lisp implementation of Medley Interlisp is closer to CLtL1 than ANSI but does support the condition system. The CONDITIONGRAPH tool shows the hierarchy graph of conditions.</p><p><a href="https://fosstodon.org/tags/interlisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interlisp</span></a> <a href="https://fosstodon.org/tags/CommonLisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CommonLisp</span></a> <a href="https://fosstodon.org/tags/lisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>lisp</span></a></p>
The Medley Interlisp Project<p>If you use or tried running Medley Interlisp, what things did you discover later on that you wish you knew? We would appreciate your feedback.</p><p><a href="https://fosstodon.org/tags/interlisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interlisp</span></a> <a href="https://fosstodon.org/tags/lisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>lisp</span></a></p>
Paolo Amoroso<p>Codeberg <span class="h-card" translate="no"><a href="https://social.anoxinon.de/@Codeberg" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>Codeberg</span></a></span> doesn't currently detect and display Interlisp sources, which it handles as binary files. I submitted a feature request for adding Interlisp support to Forgejo:</p><p><a href="https://codeberg.org/forgejo/forgejo/issues/8184" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">codeberg.org/forgejo/forgejo/i</span><span class="invisible">ssues/8184</span></a></p><p>The developers started working on the feature and merged a pull request:</p><p><a href="https://codeberg.org/forgejo/forgejo/pulls/8377" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">codeberg.org/forgejo/forgejo/p</span><span class="invisible">ulls/8377</span></a></p><p>Thanks Forgejo and Codeberg!</p><p><a href="https://oldbytes.space/tags/interlisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interlisp</span></a> <a href="https://oldbytes.space/tags/lisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>lisp</span></a> <a href="https://oldbytes.space/tags/codeberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>codeberg</span></a></p>
The Medley Interlisp Project<p>We now take it for granted but adding a display to a copying machine was a novel idea in the early 80s. In this 1984 video Austin Henderson told the history of and demoed Trillium, an Interlisp environment for designing and prototyping user interfaces for Xerox copier control panels.</p><p><a href="https://www.youtube.com/watch?v=pXwzh1Q2GeQ" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">youtube.com/watch?v=pXwzh1Q2GeQ</span><span class="invisible"></span></a></p><p>Trillium was actually more versatile as Henderson used the system to run the slideshow in this presentation. See also:</p><p><a href="https://dl.acm.org/doi/abs/10.1145/22627.22375" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">dl.acm.org/doi/abs/10.1145/226</span><span class="invisible">27.22375</span></a></p><p><a href="https://fosstodon.org/tags/interlisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interlisp</span></a> <a href="https://fosstodon.org/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>retrocomputing</span></a> <a href="https://fosstodon.org/tags/gui" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>gui</span></a> <a href="https://fosstodon.org/tags/xerox" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>xerox</span></a></p>
The Medley Interlisp Project<p>It would seem odd today but the 1986 edition of the Lafite manual had an appendix on email etiquette:</p><p>Using Lafite Courteously<br><a href="https://files.interlisp.org/medley/library/lafite/docs/users-guide/LAFITEMANUAL-APPENDIXA.TEDIT.pdf" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">files.interlisp.org/medley/lib</span><span class="invisible">rary/lafite/docs/users-guide/LAFITEMANUAL-APPENDIXA.TEDIT.pdf</span></a></p><p>The full manual of Lafite, the email system of Medley Interlisp:</p><p><a href="https://files.interlisp.org/medley/library/lafite/docs/users-guide" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">files.interlisp.org/medley/lib</span><span class="invisible">rary/lafite/docs/users-guide</span></a></p><p><a href="https://fosstodon.org/tags/interlisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interlisp</span></a> <a href="https://fosstodon.org/tags/email" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>email</span></a> <a href="https://fosstodon.org/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>retrocomputing</span></a></p>
The Medley Interlisp Project<p>The TEdit WYSIWYG editor of Medley Interlisp has a split window mode that shows different parts of a document. To split at the cursor or unsplit, middle-click on the title bar and select Split Window or Unsplit Window.</p><p><a href="https://fosstodon.org/tags/interlisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interlisp</span></a> <a href="https://fosstodon.org/tags/lisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>lisp</span></a></p>
Paolo Amoroso<p>I'm putting together a reading list on Xerox Network Systems (XNS), the network architecture developed at PARC and Xerox which influenced TCP/IP.</p><p>I'd like to learn more to play with the network functionality of Medley Interlisp based on XNS. Medley's TCP/IP stack is currently incomplete and not working.</p><p><a href="https://ftpmirror.your.org/pub/misc/bitsavers/pdf/xerox/xns/XNSG058504_XNS_Introduction.pdf" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">ftpmirror.your.org/pub/misc/bi</span><span class="invisible">tsavers/pdf/xerox/xns/XNSG058504_XNS_Introduction.pdf</span></a></p><p><a href="https://bitsavers.org/pdf/xerox/xns/XNSG_068504_Xerox_System_Network_Architecture_General_Information_Manual_Apr85.pdf" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">bitsavers.org/pdf/xerox/xns/XN</span><span class="invisible">SG_068504_Xerox_System_Network_Architecture_General_Information_Manual_Apr85.pdf</span></a></p><p><a href="https://oldbytes.space/tags/interlisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interlisp</span></a> <a href="https://oldbytes.space/tags/xerox" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>xerox</span></a> <a href="https://oldbytes.space/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>retrocomputing</span></a></p>
The Medley Interlisp Project<p>A 1988 demonstration of the Cognoter collaborative brainstorming tool in Interlisp.</p><p><a href="https://www.youtube.com/watch?v=KzBj13OSVzM" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">youtube.com/watch?v=KzBj13OSVz</span><span class="invisible">M</span></a></p><p>It was an application of project Colab at Xerox PARC to study how computers could support face-to-face-meetings. The researchers designed a conference room with specialized equipment such as a touch sensitive projection screen and collaboration software in Interlisp running on networked workstations.</p><p>About Colab:</p><p><a href="https://www.markstefik.com/?page_id=155" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">markstefik.com/?page_id=155</span><span class="invisible"></span></a></p><p><a href="https://fosstodon.org/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>retrocomputing</span></a> <a href="https://fosstodon.org/tags/interlisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interlisp</span></a> <a href="https://fosstodon.org/tags/meetings" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>meetings</span></a></p>
The Medley Interlisp Project<p>In the Medley Interlisp documentation and literature the word "button" was used as a verb for mouse gestures for which we would now say "click". For example:</p><p>"Left-buttoning the display window updates it, and middle-buttoning the window brings up a menu that allows you to change the display state."</p><p><a href="https://fosstodon.org/tags/interlisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interlisp</span></a> <a href="https://fosstodon.org/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>retrocomputing</span></a></p>
Paolo Amoroso<p>Don't mind me, I'm just poking around this newfangled OOP thing with LOOPS on Medley Interlisp. LOOPS (Lisp Object-Oriented Programming System) is the object extension of Interlisp.</p><p><a href="https://oldbytes.space/tags/interlisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interlisp</span></a> <a href="https://oldbytes.space/tags/lisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>lisp</span></a> <a href="https://oldbytes.space/tags/oop" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>oop</span></a> <a href="https://oldbytes.space/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>retrocomputing</span></a></p>
The Medley Interlisp Project<p>DIRGRAPHER is a Medley Interlisp tool that shows graphical directory trees and provides file management commands. It's part of the LispUsers collection of user contributed software.</p><p><a href="https://fosstodon.org/tags/interlisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interlisp</span></a> <a href="https://fosstodon.org/tags/lisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>lisp</span></a> <a href="https://fosstodon.org/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>retrocomputing</span></a></p>
Paolo Amoroso<p><span class="h-card" translate="no"><a href="https://fosstodon.org/@interlisp" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>interlisp</span></a></span> ☝️ This is the untold story of the Medley Interlisp project, so to speak. The paper describes the unique issues and challenges faced in reviving the system over the first 5 years of the project, and what other software preservation groups can learn from this experience.</p><p><a href="https://oldbytes.space/tags/interlisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interlisp</span></a> <a href="https://oldbytes.space/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>retrocomputing</span></a> <a href="https://oldbytes.space/tags/VintageComputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>VintageComputing</span></a></p>
The Medley Interlisp Project<p>We are happy to share the preprint and slides of the paper "The Medley Interlisp Project: Reviving a Historical Software System" by Eleanor Young et al.:</p><p><a href="https://interlisp.org/documentation/young-ccece2025.pdf" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">interlisp.org/documentation/yo</span><span class="invisible">ung-ccece2025.pdf</span></a></p><p><a href="https://interlisp.org/documentation/young-ccece2025-slides.pdf" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">interlisp.org/documentation/yo</span><span class="invisible">ung-ccece2025-slides.pdf</span></a></p><p>It tells the first 5 years of the Medley Interlisp Project and discusses what other historical software recovery groups can learn from our experience. The paper was presented at IEEE CCEECE 2025 in Vancouver and accepted for publication.</p><p><a href="https://fosstodon.org/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>retrocomputing</span></a> <a href="https://fosstodon.org/tags/interlisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interlisp</span></a> <a href="https://fosstodon.org/tags/lisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>lisp</span></a> <a href="https://fosstodon.org/tags/SoftwarePreservation" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SoftwarePreservation</span></a></p>
Simon Brooke<p><span class="h-card" translate="no"><a href="https://functional.cafe/@jackdaniel" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>jackdaniel</span></a></span> <span class="h-card" translate="no"><a href="https://mastodon.xyz/@NGIZero" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>NGIZero</span></a></span> h'mmm ... Yesterday, not for the first time, I was looking at reimplementing <a href="https://mastodon.scot/tags/InterLisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>InterLisp</span></a>'s GRAPHER library in <a href="https://mastodon.scot/tags/Clojure" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Clojure</span></a>. It's doable, but surprisingly difficult. If there was a good Java SVG engine which allowed callbacks through JavaScript or whatever, it would be easier, and *possibly* Batik may do that.</p><p>But <a href="https://mastodon.scot/tags/CommonLisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CommonLisp</span></a> in the browser, interacting with SVG in the browser... Now that sounds fun.</p><p><a href="https://mastodon.scot/tags/Lisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Lisp</span></a></p>
Paolo Amoroso<p>The LOOPS primer, published in 1987, captured well the essence of exploratory programming in Lisp:</p><blockquote><p>The LOOPS interface provides both a programming tool and a thinking tool. As you develop a new system, each preliminary version provides an object for thought and discussion. The preliminary versions are a crucial part of the design process.</p></blockquote><p>LOOPS (Lisp Object-Oriented Programming System) is the OOP extension of Interlisp.</p><p><a href="http://www.bitsavers.org/pdf/xerox/interlisp-d/198510_Koto/3102242_Xerox_LOOPS_A_Friendly_Primer_Mar87.pdf#page=60" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">http://www.</span><span class="ellipsis">bitsavers.org/pdf/xerox/interl</span><span class="invisible">isp-d/198510_Koto/3102242_Xerox_LOOPS_A_Friendly_Primer_Mar87.pdf#page=60</span></a></p><p><a href="https://oldbytes.space/tags/interlisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interlisp</span></a> <a href="https://oldbytes.space/tags/oop" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>oop</span></a> <a href="https://oldbytes.space/tags/lisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>lisp</span></a></p>
The Medley Interlisp Project<p>Fugue, Interlisp-360, Lcom, XEOS.</p><p>These are some of the terms, names, and organizations in our Glossary. It's a useful resource for getting your way around Medley Interlisp. Any other terms you'd like to see defined?</p><p><a href="https://interlisp.org/history/glossary" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">interlisp.org/history/glossary</span><span class="invisible"></span></a></p><p><a href="https://fosstodon.org/tags/interlisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interlisp</span></a> <a href="https://fosstodon.org/tags/lisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>lisp</span></a> <a href="https://fosstodon.org/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>retrocomputing</span></a></p>
Simon Brooke<p><span class="h-card" translate="no"><a href="https://gamerplus.org/@screwlisp" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>screwlisp</span></a></span> One of the things which was most exciting to me in the <a href="https://mastodon.scot/tags/InterLisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>InterLisp</span></a> D environment was the ease of producing dynamic, interactive graphs. I don't know any modern software environment which does it so well.</p><p><a href="https://mastodon.scot/tags/Lisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Lisp</span></a></p>
The Medley Interlisp Project<p>The newsletter Hotline was a support resource Xerox published in the late 1980s for users of Xerox Lisp (Interlisp and Common Lisp). It featured tutorials, usage tips, fixes, and more that are still valuable to Medley users.</p><p><a href="https://bitsavers.org/pdf/xerox/interlisp-d/hotline" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">bitsavers.org/pdf/xerox/interl</span><span class="invisible">isp-d/hotline</span></a></p><p><a href="https://fosstodon.org/tags/interlisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interlisp</span></a> <a href="https://fosstodon.org/tags/CommonLisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CommonLisp</span></a> <a href="https://fosstodon.org/tags/lisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>lisp</span></a></p>
The Medley Interlisp Project<p>The Interlisp function COMPARELISTS compares the structures of two lists and prints a terse description of the differences which highlights the items that differ. More details are in the Interlisp Reference Manual.</p><p><a href="https://interlisp.org/documentation/IRM.pdf#page=51" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">interlisp.org/documentation/IR</span><span class="invisible">M.pdf#page=51</span></a></p><p><a href="https://fosstodon.org/tags/interlisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interlisp</span></a> <a href="https://fosstodon.org/tags/lisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>lisp</span></a></p>
Paolo Amoroso<p>I submited to Forgejo (and hence Codeberg) a feature request to support Interlisp source files but it may be hard to implement. So I'm stuck with GitHub for Interlisp code.</p><p><a href="https://codeberg.org/forgejo/forgejo/issues/8184" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">codeberg.org/forgejo/forgejo/i</span><span class="invisible">ssues/8184</span></a></p><p><a href="https://oldbytes.space/tags/interlisp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interlisp</span></a> <a href="https://oldbytes.space/tags/forgejo" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>forgejo</span></a> <a href="https://oldbytes.space/tags/codeberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>codeberg</span></a></p>