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[[File:APL Campfire Logo.png|thumb|right|[[humour#apples|Humorous]] promotional logo.]]
[[File:APL Campfire Logo.png|thumb|right|[[humour#apples|Humorous]] promotional logo.]]
The '''APL Campfire''' is a recurring meeting hosted by [[Adám Brudzewsky]] every fourth Sunday at 18:00 UTC, since 9 May, 2021, with each session lasting about an hour. The event focuses on the history of APL programming, inviting participants to tell stories of their experiences, and is recorded for future reference.
The '''APL Campfire''' is a recurring meeting hosted by [[Adám Brudzewsky]] every fourth Sunday at 18:00 UTC, since 9 May, 2021, with each session lasting about an hour. The event focuses on the history of APL programming, inviting participants to tell stories of their experiences, and is recorded for future reference.<ref>[https://www.youtube.com/playlist?list=PLYKQVqyrAEj91hZHbJiWOENHZP4JT8VFv YouTube playlist]</ref>


APL Campfires are held using [[wikipedia:Zoom (software)|Zoom]]:
APL Campfires are held using [[wikipedia:Zoom (software)|Zoom]]:
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== 2021 ==
== 2021 ==
{| class=wikitable
{| class=wikitable
! Date !! Speakers !! Subjects discussed
! Date !! Speakers !! Subjects discussed !! text-align:center | Recording
|-
|-
| May 9 || Harry Saal, Joel Wittenberg, Adám Brudzewsky || APL on mainframes, <source lang=apl inline>⎕FMT</source>'s  <source lang=apl inline>G</source>,<ref>"Joel Wittenberg made critical assessments of that design and suggested important  
| May 9 || Harry J. Saal, Joel Wittenberg, Adám Brudzewsky || APL on mainframes, <source lang=apl inline>⎕FMT</source>'s  <source lang=apl inline>G</source>,<ref>"Joel Wittenberg made critical assessments of that design and suggested important  
elaborations which were incorporated in later designs." [[Adin Falkoff]]: ''[https://doi.org/10.1145/800142.805342 A pictorial format function for patterning decorated numeric displays]''. [[APL81]].</ref> and more (was not recorded)
elaborations which were incorporated in later designs." [[Adin Falkoff]]: ''[https://doi.org/10.1145/800142.805342 A pictorial format function for patterning decorated numeric displays]''. [[APL81]].</ref> and more || ―
|-
|-
| Jun 6 || Joel Wittenberg, Ron Murray || Murray's history with APL, including [[APL/700]] and the [[APL Machine]], and at Microsoft. Wittenberg's early exposure to [[Iverson Notation]] and [[PAT]]. ([https://www.youtube.com/watch?v=GlUa1vz2OSM recording: 1:03])
| Jun 6 || Joel Wittenberg, Ron Murray || Murray's history with APL, including [[APL/700]] and the [[APL Machine]], and at Microsoft. Wittenberg's early exposure to [[Iverson Notation]] and [[PAT]]. || [https://www.youtube.com/watch?v=GlUa1vz2OSM 1:06:28]
|-
|-
| Jul 4 || [[wikipedia:Len Shustek|Len Shustek]], Joey Tuttle, Joel Wittenberg || Shustek at [[IBM]], Standord, SLAC, making APL\360 a multi-user system, running it under other OSs, [[wikipedia:https://en.wikipedia.org/wiki/OS/360_and_successors#MFT|MFT]] & (Experimental) [[wikipedia:https://en.wikipedia.org/wiki/OS/360_and_successors#MVT|MVT]], the [[wikipedia:Computer History Museum|Computer History Museum]], [[APL.SV]], [[Phil S. Abrams]] ([https://www.youtube.com/watch?v=q1MqfzilWX0 recording: 1:06])
| Jul 4 || [[wikipedia:Len Shustek|Len Shustek]], Joey Tuttle, Joel Wittenberg || Shustek at [[IBM]], Standord, SLAC, making APL\360 a multi-user system, running it under other OSs, [[wikipedia:https://en.wikipedia.org/wiki/OS/360_and_successors#MFT|MFT]] & (Experimental) [[wikipedia:https://en.wikipedia.org/wiki/OS/360_and_successors#MVT|MVT]], the [[wikipedia:Computer History Museum|Computer History Museum]], [[APL.SV]], [[Phil S. Abrams]] || [https://www.youtube.com/watch?v=q1MqfzilWX0 1:06:24]
|-
|-
| Aug 1 || [[Gitte Christensen]], Joey Tuttle, Joel Wittenberg || Working at [[IPSA]], [[Ian Sharp]], [[666 BOX]] (early email), MagicStore, meeting people online (including [[Morten Kromberg]]), Christensen's first APL application, [[APL conference]]s, the [[boxed]]/[[nested]] split, [[Ken Iverson]]'s [[Rationalized APL]] and [[J]], the [[Rank operator]], [[IBM]]/Insight Systems/Adaytum/Cognos/Dyadic Systems/[[Dyalog Ltd.]], [[Alex Morrow]] (will be recorded)
| Aug 1 || [[Gitte Christensen]]<ref>2016 [[Iverson Award]] winner.</ref>, Joey Tuttle, Joel Wittenberg || Working at [[IPSA]], [[Ian Sharp]], [[666 BOX]] (early email), MagicStore, meeting people online (including [[Morten Kromberg]]), Christensen's first APL application, [[APL conference]]s, the [[boxed]]/[[nested]] split, [[Ken Iverson]]'s [[Rationalized APL]] and [[J]], the [[Rank operator]], [[IBM]]/Insight Systems/[[Adaytum]]/Cognos/Dyadic Systems/[[Dyalog Ltd.]], [[Alex Morrow]] || [https://www.youtube.com/watch?v=OAu03M5fLck 1:06:22]
|-
|-
| Aug 29 || [[Ray Polivka]]<ref>1990 [[Iverson Award]] winner and co-author of three authoritative APL textbooks.</ref> || TBD (will be recorded)
| Aug 29 || [[Ray Polivka]]<ref>1990 [[Iverson Award]] winner and co-author of three authoritative APL textbooks.</ref>, [[Jon McGrew]], [[Joey Tuttle]], Walter Fil, Joel Wittenberg || [[ILLIAC]], at [[IBM]], [[wikipedia:Fred Brooks|Fred Brooks]], [[Adin Falkoff]], [[APL\360]], [[wikipedia:IBM 7030 Stretch|IBM 7030 Stretch]], [[IVSYS/7090]], [[Ken Iverson]], [[wikipedia:Science Research Associates|Science Research Associates]], [[wikipedia:computer assisted instruction|computer assisted instruction]], [[wikipedia:IBM 1500|IBM 1500]], teaching APL, [[books]] (own and others'), [[SIGAPL]], [[wikipedia:SHARE (computing)|SHARE]], [[APL conference]]s, [[Iverson Award]], [[Garth Foster]], [[APL Quote Quad]], [[Minnowbrook]], upcoming fourth book, [[APL 5100]], <source lang=apl inline>)MSG</source>, [[wikipedia:MCM/70|MCM/70]] || [https://www.youtube.com/watch?v=w1VMeSzJLyE 1:47:56]
|-
|-
| Sep 26 || TBD || TBD (will be recorded)
| Sep 26 || Andy Shiers<ref>At Dyadic Systems since 1987, now Dyalog's Chief of Operations.</ref> and [[Geoff Streeter]]|| 40 years of Dyalog APL, early days of [[Dyadic Systems]] || [https://www.youtube.com/watch?v=xjgkqmRJrPc 1:05:42]
|-
| Oct 24 || [[Jim Brown]], Ron Murray || Early days at [[IBM]] and [[Syracuse University]]. Discussions with [[Ken Iverson]] and [[Adin Falkoff]], extending [[decode|base value]] (<source lang=apl inline>⊥</source>) and [[Encode|represent]] (<source lang=apl inline>⊤</source>) to work on higher [[rank]] arrays. Ragged [[array]]s vs [[nested array]]s. <source lang=apl inline>⎕AX</source> as prototyping too; to switch axiom system for enclosing a scalar. Origin of [[wikipedia:foo|foo]] as a placeholder name in programming. Resistance to APL at IBM. Interesting internal applications at IBM: a stock application (still in use today) and QMF (Query Management Facility). Using APL for models of [[primitive]]s and extensions. Behaviour of [[outer product]] (<source lang=apl inline>∘.</source>), [[strand notation]], [[prototype]]s for [[each]] on [[empty array]]s, [[system label]]s. [[NARS2000]]'s ball arithmetic. Differences in floating point results of APL vs [[wikipedia:PL/I|PL/I]] implementations of IBM's internal planning system. The meaning of [[monadic]] [[Up Arrow]] (<source lang=apl inline>↑</source>) and [[Right Shoe]] (<source lang=apl inline>⊃</source>). Influence from [[wikipedia:Lisp (programming language)|Lisp]]  ([[first]] as <source lang=apl inline>↑</source> and "last" as <source lang=apl inline>↓</source>), symbols, Mike Jenkins's [[Matrix Inverse]] and [[Matrix Divide]] (<source lang=apl inline>⌹</source>), Disjoined arrays using a dedicated Disjoined Array Computer (DAC), hardware [[APL machine]]s/processors, [[shared variable]]s. || [https://www.youtube.com/watch?v=eFtO_vtCNEw&t=259s 1:26:13]
|-
| Nov 21 || Zbigniew "Ziggy" Stachniak<ref>Computing historian, associate professor of computer science at York University in Toronto, and author of [https://www.google.co.uk/books/edition/Inventing_the_PC/cyWOA2FED7EC?hl=en Inventing the PC].</ref>, [[CoSy|Bob Armstrong]] || Timeline leading to [[MCM/70]]:[[wikipedia:Mers Kutt]], [[York APL]], [[wikipedia:Intel 8008|Intel 8008]], [[APL '73]], [https://www.youtube.com/watch?v=AaQdzKnOxJE speed of <source lang=apl inline>0.7÷⍳255</source>], battery-operation, European tour and selling [https://www.youtube.com/watch?v=tcxXxAxxL5I the computer as a personal calculator], users of MCM/70, [[IBM]] possible "inspiration" to create the [[APL 5100|IBM 5100]], the display technology, the applications libraries including [https://www.youtube.com/watch?v=YitUfJySYz4 games], [https://museum.eecs.yorku.ca/ York University Computer Museum], using APL for arts, [https://museum.eecs.yorku.ca/mcm70e the MCM/70 emulator]. || [https://www.youtube.com/watch?v=QA9XymS-vho 1:09:21]
|-
| Dec 19 || [[Charles Brenner]] || [[APL\360]] and [[APL\1130]] ||
|}
 
== 2022 ==
{| class=wikitable
| Jan 16 || TBD || TBD ||
|}
|}


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<references/>
<references/>


{{APL community}}[[Category:Online resources]]
{{APL community}}[[Category:Online sessions]]
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