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As of {{CURRENTMONTHNAME}} {{CURRENTYEAR}}, APL does not have a logo like many other programming languages do. After a consensus at their September 9th 2021 [[BAA webinar|webinar]], [[BAA]] will head an effort to adopt a universal [[vendor]]-agnostic logo for APL. This article collects draft proposals for the universal APL logo. Feel free to [{{fullurl:{{FULLPAGENAME}}|action=edit&section=1}} add your own].
[[File:APL logo.png|thumb|right|The official APL logo.]]
[[File:APL matrix logo Clarendon.png|thumb|right|"APL Matrix" — the backup option.]]


== Proposals ==
The official APL logo was designed by [[Adám Brudzewsky]] and was adopted by [[BAA]] at the [[BAA Webinar]] on May 19, 2022, thereby concluding a nine months long process.


The logo has no legal restrictions on usage and is [https://github.com/abrudz/logos/tree/main/apl available in vector and bitmap formats]. Many kinds of [[APL merchandise|merchandise]] featuring the logo can be bought online.
The logo can be experienced in various realistic web contexts, including as favicons:
# [https://abrudz.github.io/logos In a gallery of programming language logos]
# [https://abrudz.github.io/logos/funccomf.html On a mock conference website]
# [https://abrudz.github.io/logos/codebars.html On a mock programming competition website] (in monochrome)
Though a logo has now been chosen, this page documents the candidate designs for reference.
== History ==
At the September 9th 2021 BAA webinar, the effort to adopt a universal [[vendor]]-agnostic logo for APL was initiated. This [[APL Wiki]] article was used as a portal for the work. Submission of concept work ran until the end of 2021, and voting for logos ran until 2022-02-10 at 16:15 UTC.
At the 2022-02-10 BAA Webinar, the results were revealed and discussed. Ignoring obvious spam votes, the clear winner was [[#Nested_Bitmaps|Nested Bitmaps]]. For a second place, [[#APL_Matrix|APL Matrix]] seems to have won, unless counting [[#Lamp_Box|Lamp Box]] and [[#Lamp_Rho_Downstile_Box|Lamp Rho Downstile Box]] are counted as a single proposal for small-size and larger uses respectively.
It was decided to go with the Nested Bitmaps concept for now, with APL Matrix as a backup in case Nested Bitmaps is found to conflict with [[wikipedia:Apple Inc.#Logo|Apple Inc.'s logo]]. It was also observed that Lamp Box, modified to have sharp corners and a darker background, could be seen as the bottom left part of APL Matrix, for use at small sizes.
As with all candidates, the winners are not considered final designs; exact execution, colours, and fonts (including whether or not to stylise the letters "APL" as <code>⍝⍴⌊</code>. During the 2022-02-24 BAA webinar, it was decided to go ahead with the Nested Bitmaps logo, and a couple of attendees were tasked with finding pricing for professional designers to polish it. On 2022-03-11, BAA hired such a designer for the task.
The designer went with a uniformly coloured apple, which led to the idea of shrinking the letters to fit them entirely inside their blocks, avoiding the issue of touching the background colour. Finally, during the 2022-05-20 BAA webinar, the attendees voted to replace the blocky bitmap font with a traditional Clarendon, matching the old IBM manuals, and the new Fortran logo.
=== Criteria ===
The choice of logo concept was to be done while keeping in mind that a common logo is intended for branding demonstrations, presentations, systems, documentation, and other visual materials. Its core purpose is to proclaim that "this is APL in action". Furthermore, it should work as a [[wikipedia:favicon|favicon]] (possibly slightly modified to fit the technical constraints) as well as in banners, including on both dark and light backgrounds. It was also seen as beneficial if the final logo could easily be adapted to a monochrome form, for usage in printed materials, stencils, and existing designs. The chosen logo does indeed permit such uses.
It was established that the ideal logo was signal that:
# ''this algorithm/product/person/company uses APL'' for increased brand recognition
# ''APL is a programming language'' as opposed to any of the other things named [[wikipedia:APL|APL]]
# ''APL is a sophisticated IT tool'' which delivers tangible benefits
{{clear}}
== Logos based on apples ==
=== [[File:50yearsapple.png|16px|frameless]] 50 Years Apple ===
[[File:50yearsapple.png|120px|frameless|left]]
This is based on the logo that [[Dyalog Ltd.]] commissioned for [https://www.dyalog.com/50-years-of-apl.htm APL's 50th anniversary], which was inspired by the
[[:File:I_like_APL_graphic.jpg|original "I like APL" apple motif]]; the green colour also recognises this original motif. As with some of the other suggestions, the simplicity and single colour means that it would still work well when shrunk to the size of a favicon and could be rendered in black and white without loss of detail.
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=50%20years%20apple%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
{{clear}}
=== [[File:Angular Textured Apple.png|16px|frameless]] Angular Textured Apple ===
[[File:Angular Textured Apple.png|120px|frameless|left]]
This apple-based logo is designed by Aaron Brudzewsky. It uses realistic textures exclusively, for a crisp fresh look. The angles and orthogonally constructed letters hint at APL's emphasis on orthogonal [[array]]s.
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=Angular%20Textured%20Apple%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
{{clear}}
=== [[File:Circles.png|16px|frameless]] Circles ===
[[File:Circles.png|120px|frameless|left]]
This is stylised enough not to get in trouble with Apple Inc, while still being a recognisable development of the traditional symbolism. The italic Clarendon and the Carbon red and green are honouring APL's IBM heritage.
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=Circles%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
{{clear}}
=== [[File:APL_logo_light.png|16px|frameless]] Cube Apple ===
[[File:APL_logo_light.png|120px|frameless|left]]
[[File:APL_logo_light.png|120px|frameless|left]]
=== Cube Apple ===
This is a cube, which is a common APL motif, e.g. used for [[APL2]] (including the book [[Books#APL2_at_a_Glance|APL2 at a glance]]), [[APL*PLUS]] and [[Dyalog APL]]. However, one quarter has been modified to resemble a leaf, thus making the cube into an [[apple]], another common association with APL. The leaf is supposed to hint at the [[Del]] which symbolises [[function]] definition and has been used in application icons for [[APL+]] and [[APLX]]. The green colours come from [[IBM]]'s modern '''Carbon''' design to honour IBM's role APL's history. The lettering spells out "APL" while also hinting at APL's usage of special [[glyphs]]; here <code>⍝⍴⌊</code> which look very close to the forms found in the widespread ''APL385 Unicode'' [[font]].
This is a cube, which is a common APL motif, e.g. used for [[APL2]] (including the book [[Books#APL2_at_a_Glance|APL2 at a glance]]), [[APL*PLUS]] and [[Dyalog APL]]. However, one quarter has been modified to resemble a leaf, thus making the cube into an [[apple]], another common association with APL. The leaf is supposed to hint at the [[Del]] which symbolises [[function]] definition. The green colours come from [[IBM]]'s modern '''Carbon''' design to honour IBM's role APL's history. The lettering spells out "APL" while also hinting at APL's usage of special [[glyphs]]; here <code>⍝⍴⌊</code> which look very close to the forms found in the widespread ''APL385 Unicode'' [[font]].
 
This may be too reminiscent of the [[Dyalog APL]] application logo to be a general and independent APL logo.
 
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=Cube%20apple%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
 
 
{{clear}}


[[File:Nested bitmaps logo.png|120px|frameless|left]]
=== [[File:Jokerman logo.jpg|16px|frameless|left]] Jokerman ===
[[File:Nested bitmaps logo dark.png|120px|frameless|right]]
[[File:Jokerman logo.jpg|120px|frameless]]
=== Nested Bitmaps ===
Logo from the [https://www.linkedin.com/groups/1805002/ LinkedIn ''APL - A Programming Language'' group] featuring the letters "APL" in the Jokerman font, but with the dot in the letter L replaced by an apple.
This logo is a reinterpretation based on the classic APL [[apple]] with the leaf styled as a filled [[Del]] which symbolises [[function]] definition. The green colour comes from [[IBM]]'s modern '''Carbon''' design to honour IBM's role APL's history. The apple is subdivided into a rectangular pattern which is supposed to invoke a [[matrix]] and  the middle row in turn holds three 4-row, 3-column [[Boolean]] matrices to spell out "APL" as bitmaps. This matrix of matrices hints at APL's multi-dimensional [[nested array]]s. The logo also exists as a variant for dark backgrounds.


::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=Jokerman%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
{{clear}}
=== [[File:Nested bitmaps logo.png|16px|frameless]] Nested Bitmaps ===
[[File:Nested bitmaps logo dark.png|120px|frameless|left]]
[[File:Alternative nested bitmaps.png|frameless|right|Alternative nested bitmap logos]][[File:Nested bitmaps logo.png|120px|frameless|left]]
This logo is a reinterpretation based on the classic APL [[apple]] with the leaf styled as a filled [[Del]] which symbolises [[function]] definition and has been used in application icons for [[APL+]] and [[APLX]]. The green colour comes from [[IBM]]'s modern '''Carbon''' design to honour IBM's role APL's history. The apple is subdivided into a rectangular pattern which is supposed to invoke a [[matrix]] and  the middle row in turn holds three 4-row, 3-column [[Boolean]] matrices to spell out "APL" as bitmaps. This matrix of matrices hints at APL's multi-dimensional [[nested array]]s. The logo exists in various variations.
This logo relies on contrast contrasts in a way that necessitates having two parallel logos, one for light backgrounds and one for dark backgrounds.
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=Nested%20bitmaps%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
{{clear}}
=== [[File:Script logo.png|16px|frameless]] Script apple [[File:Script logo filled.png|16px|frameless]] ===
[[File:Script logo.png|120px|frameless|left]]
[[File:Script logo.png|120px|frameless|left]]
[[File:Script logo filled.png|120px|frameless|right]]
[[File:Script logo filled.png|120px|frameless|right]]
=== Script logo ===
This [[apple]] logo is a basic update of [[IBM]]'s classic "I like APL" promotional, but with the leaf styled as a filled [[Del]] which symbolises [[function]] definition and has been used in application icons for [[APL+]] and [[APLX]]. The colours comes from [[IBM]]'s modern '''Carbon''' design to honour IBM's role APL's history. The script lettering commemorates APL's origins as handwritten notation and at the same time symbolises the ease with which APL is written. On dark backgrounds, the lettering would be produced in white rather than black. The logo also exists as a filled green version.
This [[apple]] logo is a basic update of [[IBM]]'s classic "I like APL" promotional. The colours comes from [[IBM]]'s modern '''Carbon''' design to honour IBM's role APL's history. The script lettering commemorates APL's origins as handwritten notation and at the same time symbolises the ease with which APL is written. On dark backgrounds, the lettering would be produced in white rather than black. The logo also exists as a filled green version.
 
For good and for bad, [[Dyalog Ltd]] has already adopted a slight variation of this for use as the [[APL Seeds]] logo (user meetings, events and information specifically for new APLers) – [https://www.dyalog.com/apl-seeds-user-meetings/aplseeds21.htm see here for an example] and the detail makes it harder to shrink. Some think the filled version is more reminiscent of a bell pepper than an apple.
 
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=Script%20apple%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
 
 
{{clear}}
 
== Logos based on grids ==
=== [[File:APL matrix logo.png|16px|frameless]] APL Matrix [[File:matrix logo.png|16px|frameless]] [[File:APL matrix logo Clarendon.png|16px|frameless]] [[File:APL matrix logo Plex.png|16px|frameless]]===
[[File:APL matrix logo.png|120px|frameless|left]]
<div style=float:right>[[File:matrix logo.png|120px|frameless]]  [[File:APL matrix logo Clarendon.png|120px|frameless]]  [[File:APL matrix logo Plex.png|120px|frameless]]</div>
This logo is inspired by the logos of TypeScript, JavaScript, and WebAssembly, being lettering along the bottom of a theme coloured square. The APL logo is distinct in its usage of Lamp Rho Downstile and in splitting up the square into subsquares to hint at APL's multi-dimensional arrays. The colour of the centre square is from IBM's Carbon design and occupies the saturated green gap in the rainbow of programming language logos. For small icons, the lettering can be left out. As an alternative to the Lamp Rho Downstile, the letters could be shown in a proper font like the traditional IBM user guide cover sheet font Clarendon (as used in the Fortran logo), or the modern IBM programming font Plex Mono.
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=APL%20Matrix%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
 
{{clear}}
=== [[File:OOQQ APL bright green proposal.jpg|16px|frameless]] APL Rotated Array [[File:APL dots proposal.jpg|16px|frameless]] [[File:Rotated Array with APL.png|16px|frameless]]===
[[File:OOQQ APL bright green proposal.jpg|120px|frameless|left]]
<div style=float:right>
[[File:APL dots proposal.jpg|120px|frameless]]
[[File:Rotated Array with APL.png|120px|frameless]]
</div>
Following the central ideas of "Array-Based" Language, the three letters of the name, and the most established APL logo to date ([[APL Wiki logo|the APL Wiki one]]); This logo tries to encompass and simplify all of them, while the rotation and the negative space hints the nature of the multi-dimensional arrays that APL is founded on. The colour is green, hinting the IBM Carbon green lettering, begin friendly with hard reproduce surfaces that will need a black-and-white version, and also becoming the only green logo in the programming language landscape. Also exists in a darker version. Made by [https://ooqq.me OOQQ]
 
This logo does not spell out "APL" and while there are three central circles, they are likely too far apart to frame one letter each. A solution, would be to put them on the diagonal
 
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=APL%20Rotated%20Array%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
 
 
{{clear}}
 
=== [[File:APL_Wiki_Touch_Square.png|16px|frameless]] APL Wiki [[File:APL LOGO Black.png|16px|frameless]] [[File:APL LOGO 2aac50ff.png|16px|frameless]] ===
[[File:APL_Wiki_Touch_Square.png|120px|frameless|left]]
<div style="float:right">
[[File:APL LOGO Black.png|120px|frameless]]
[[File:APL LOGO 2aac50ff.png|120px|frameless]]
</div>
The [[APL Wiki logo]] encapsulates features of APL, is visually striking and takes an interesting new approach over traditional apple or cube designs. Its use here has already established its independent, community-wide use. It works in a variety of sizes and its simple black and white palette makes it suitable for all media forms. This logo could be enhanced with the letters "APL" either underneath, or within the middle dots of the middle row, and optionally stylised as the classical APL glyphs <code>⍝⍴⌊</code>. It could also be recoloured in [[IBM]]'s modern '''Carbon''' green.
 
Clearly, if you visit the APL wiki you'd expect to see the APL logo - and perhaps you already do.
 
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=APL%20Wiki%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
 
 
{{clear}}
 
== Logos based on the letters APL ==
=== [[File:Apl arrayness.png|16px|frameless|left]] APL Array ===
[[File:Apl arrayness.png|90px|frameless|left]]
This logo represents an array and the letters A, P, and L, which together make up the array.
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=APL%20Array%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
 
 
{{clear}}
=== [[File:APL_Germany.jpg|16px|frameless|left]] APL Germany ===
[[File:APL_Germany.jpg|120px|frameless|left]]
The icon used by [[APL Germany]].
 
It might be unclear whether the name is "ALP" or "APL".
 
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=APL%20Germany%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
 
 
{{clear}}
 
=== [[File:DirectionAndMagnitude.png|16px|frameless]] Direction and Magnitude ===
[[File:DirectionAndMagnitude.png|120px|frameless|left]]
The colors are taken from the Canadian flag.
 
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=Direction%20and%20Magnitude%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
 
 
{{clear}}
=== [[File:Display matrix.png|16px|frameless]] Display matrix [[File:Display matrix green.png|16px|frameless]] ===
[[File:Display matrix.png|120px|frameless|left]]
[[File:Display matrix green.png|120px|frameless|right]]
This is the output from the classic <syntaxhighlight lang=apl inline>DISPLAY</syntaxhighlight> function when applied to the matrix <syntaxhighlight lang=apl inline>1 3⍴APL</syntaxhighlight>.
 
If placed in the matrix of other logos, it would stand out a bit because of its simplicity. A good graphic designer could stylize it a bit, perhaps removing some white space, a little kerning on the letters, some color, etc. The font could also be replaced with an older font where the characters are more italicized or even underscored. The frame might be improved if the arrows and the lines were connected without breaks.
 
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=Display%20matrix%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
 
 
{{clear}}
 
=== [[File:Ligature Original.jpg|16px|frameless]] Ligatures [[File:Ligature Separated.jpg|16px|frameless]] [[File:Ligature Separated Aligned.jpg|16px|frameless]] [[File:Ligature AP.jpg|16px|frameless]] ===
[[File:Ligature Original.jpg|120px|frameless|left]]
<div style=float:right>
[[File:Ligature Separated.jpg|120px|frameless]]
[[File:Ligature Separated Aligned.jpg|120px|frameless]]
[[File:Ligature AP.jpg|120px|frameless]]
</div>
This is Jon McGrew's reworks of an original design by Joseph DeKerf that used the [[wikipedia:ITC Avant Garde|ITC Avant Garde]] font. The original is arguably ambiguously APL/ALP, hence the alternative versions.
 
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=Ligatures%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
 
 
{{clear}}
 
=== [[File:apl_logo1.PNG|16px|frameless]] Modern [[File:Apl logo2.png|16px|frameless]] ===
[[File:apl_logo1.PNG|120px|frameless|left]]
[[File:Apl logo2.png|120px|frameless|right]]
This logo follows the style of the logos of JavaScript and its relatives/derivatives, but can optionally be made to stand out more with the distinctive [[power]] glyph.
 
The star when used in a flag-like context, may have negative connotations to some.
 
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=Modern%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
 
 
{{clear}}
 
=== [[File:Parallel Lines.png|16px|frameless]] Parallel Lines ===
[[File:Parallel Lines.png|120px|frameless|left]]
This logo is from the cover of the original edition of Paul Berry's [[SHARP APL]] Reference Manual.
 
This might appeal to those who have fond memories of the rather brilliant book, some would consider the design very dated, and it can be hard to read unless you already know that it says "APL". It also doesn't render well when small, and would need modification to work in a monochrome setting.
 
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=Parallel%20lines%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
 
 
{{clear}}
 
=== [[File:Plain Ellipse.png|16px|frameless]] Plain Ellipse ===
[[File:Plain Ellipse.png|120px|frameless|left]]
This is a plain ellipse designed by Juda Brudzewsky. It is similar to the logo of [[wikipedia:PHP (programming language)|PHP]], using the warning red from IBM's Carbon design. The font is reminiscent of [[wikipedia:Clarendon (typeface)|Clarendon]] used for the covers of IBM's manuals at the time when APL first appeared. Note that [[APL\360]]'s name was originally always styled in italics, technology permitted.
 
If this logo concept is chosen, it should have a different colour than red, to avoid being overly similar to the logo of [https://twitter.com/apl_media APL Media].
 
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=Plain%20Ellipse%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
 
 
{{clear}}
 
=== [[File:APL_GreyScale960(2).png|16px|frameless|left]] APL Shape [[File:APL_Bronze960Black.png|16px|frameless]] [[File:APL_Bronze960White.png|16px|frameless]] ===
[[File:APL_GreyScale960(2).png|120px|frameless|left]]
<div style=float:right>
[[File:APL_Bronze960Black.png|120px|frameless]]
[[File:APL_Bronze960White.png|120px|frameless]]
</div>
The thinking here is an APL Logo for general use and promoting the APL language has to be distinctive (so people notice and remember it), has to include the letters APL (as the people we want to attract will mostly not know what APL is), has also to include the words "A Programming Language" (to destinguish it from other instances of "APL") and should ideally be in 3D  or use some other means to emphasize that APL can process Arrays with complex structures and multiple dimensions. The challenge is to get all that into 120 pixels - assuming that is indeed the typical size for the Logo in use. This is a first stab and lots of variants of this basic idea are possible, bronze with black or white backgrounds, for example; which I happen to like but has the additional benefit that no other Program Language Logos use this colour. It shows up well at 16 pixels on a white background, but not on black, sadly.
 
The phrase "A Programming Language" estabishes that the main logo says "APL", but further work to emphasize this point would be useful.
 
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=APL%20Greyscale3D%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
 
 
{{clear}}
 
=== [[File:AplBox.png|16px|frameless|left]] Letters From the Cube [[File:AplBoxGreenW.png|16px]] [[File:AplBoxGreenB.png|16px]] [[File:AplBoxGreenW nofill.png|16px]] [[File:AplBoxGreenB nofill.png|16px]] ===
[[File:AplBox.png|120px|frameless|left|Letters From The Cube]]
<div style=float:right>
[[File:AplBoxGreenW.png|120px]] [[File:AplBoxGreenB.png|120px]] [[File:AplBoxGreenW nofill.png|120px]] [[File:AplBoxGreenB nofill.png|120px]]
</div>
Simple 3D logo from the imagination. The variants on the right are renderings of 4-by-4-by-4 Binary [[wikipedia:voxel|voxel]]s. Each letter A, P, and L, are projections of that cube as follows:{{clear}}
<syntaxhighlight lang=apl>
    b←4 4 4⍴(5 ¯2 6 ¯3 1 ¯8,23↑12⍴¯3 1)\'⎕' ⋄ (⊣/b)(⊣⌿b)(⊢/[2]b)
⎕⎕⎕⎕  ⎕⎕⎕⎕  ⎕   
⎕  ⎕  ⎕  ⎕  ⎕   
⎕⎕⎕⎕  ⎕⎕⎕⎕  ⎕   
⎕  ⎕  ⎕    ⎕⎕⎕⎕
</syntaxhighlight>
 
It might be unclear whether the name is "ALP" or "APL".
 
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=Letters%20From%20the%20Cube%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
 
 
{{clear}}
 
== Logos based on APL glyphs ==
=== [[File:3D Lamp Rho Downstile.png|16px|frameless]] 3D Lamp Rho Downstile ===
[[File:3D Lamp Rho Downstile.png|120px|frameless|left]]
This is a variation on the [[#APL Germany|APL Germany]] icon, created by Tobias Wessels after Dieter Kilsch proposed it during the [[APL Germany]] meetup in November 2021. It takes the idea of using <code>⍝⍴⌊</code> as stylised letters "APL" and combining them into a 3D structure, alluding to APL's multi-dimensional arrays. It should be noted that it is intended as a rough draft, and that both final design and colour choices are subjust to evaluation by a professional logo designer.
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=3D%20Lamp%20Rho%20Downstile%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
 
{{clear}}
=== [[File:LampBox.png|16px|frameless]] Lamp Box ===
[[File:LampBox.png|120px|frameless|left]]
 
This back-to-basics logo consists of a boxed Comment [[glyph]], which is recognisable for all APL programmers. Non-APLers should be able to guess with language it represents based on it also being a stylised A for APL (and removing P and L makes include [[A+]] better). It uses the IBM green but works fine when rendered in black-and-white or black-on-bright or white-on-dark. It also remains very legible in small sizes, like when used as a [[wikipedia:favicon|favicon]].
 
This could be used in combination with Lamp Rho Downstile Box, this one being used for small sizes like for favicons.
 
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=Lamp%20Box%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
 
{{clear}}
 
=== [[File:LampRhoDownstile.png|16px|frameless|left]] Lamp Rho Downstile===
[[File:LampRhoDownstile.png|120px|frameless|left]]
[[IBM]] '''Carbon''' green lettering of "APL" stylised as APL's [[glyphs]] <code>⍝⍴⌊</code> in a manner that is very close to the forms found in the widespread ''APL385 Unicode'' [[font]].
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=Lamp%20Rho%Downstile%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
 
 
{{clear}}
 
=== [[File:LampRhoDownstileBox.png|16px|frameless|left]] Lamp Rho Downstile Box [[File:LampRhoDownstileBlocky.png|16px|frameless]] [[File:LampRhoDownstileBox16Zoom.png|16px|frameless]] ===
[[File:LampRhoDownstileBox.png|120px|frameless|left]]
<div style=float:right>
[[File:LampRhoDownstileBlocky.png|120px|frameless]]&emsp;[[File:LampRhoDownstileBox16Zoom.png|120px|frameless]]
</div>
A version of the Lamp Rho Downstile logo in a box with matching rounded corners. This has the benefit of working well in 16px icon size, but can also be custom drawn as pixel art. Variations include a brutalist version and zoomed pixel art with or without faint grid.
 
This could be used in combination with Lamp Box, that one being used for small sizes like for favicons.
 
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=Lamp%20Rho%Downstile%20Box%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
 
 
{{clear}}
 
=== [[File:QuadAPLAlt.png|16px|frameless]] Quad APL [[File:QuadAPL.png|16px|frameless]] ===
[[File:QuadAPLAlt.png|90px|frameless|left]]
[[File:QuadAPL.png|90px|frameless|right]]
This is the design by LdBeth that plotted by the MetaPost program below. It is composed visually by Quad, And, Circle (Pi), Left Tack, and forms the stylized "APL". One day he needs an icon for his APL keyboard layout, and he spent an hour to do the sketching and wrote the code in his favorite font design tool MetaFont. The right one is the old, original one. There might be alternative glyphs, and he will gladly accept any interesting suggestions for improvements.
 
{{Collapse|MetaFont code converted to MetaPost for vectorized output.|<pre>
% show bound box
prologues := 2;
beginfig(1);
  % edge
  e=5;
  a=40;b=28;
  % misc points
  m=0.3a;n=0.5b;t=2;
  % center
  z0=(e+n,e+0.4a);r=7;
  % quad
  z1=(e,e);z2=(e,a+e);z3=(b+e,a+e);z4=(b+e,e);
  % and
  z5=(e+t,e+m);z6=(e+n,e+0.8a);z7=(e+b-t,e+m);
  % pi
  z8=z0+(0,r);z9=z0+(r,0);
  z10=z0-(0,r);z11=z0-(r,0);
  % left
  z12=(z1+z4)/2;z13=z10-(0.3b,0);
  % draw
  pickup pencircle scaled 3;
  draw z1--z2--z3--z4--cycle;
  draw z5--z6--z7;
  draw z8..z9..z10..z11..cycle;
  draw z0--z12; draw z10--z13;
endfig;
end
</pre>
}}
 
This logo may be too cryptic, as neither the name APL, nor individual APL glyphs are very distinguishable.
 
::'''[{{fullurl:{{TALKPAGENAME}}|action=edit&section=new&preloadtitle=Quad%20APL%20comment%20by%20~~<noinclude></noinclude>~}} Click here to leave feedback on this logo.]'''
 
 
{{clear}}

Latest revision as of 22:12, 10 September 2022

The official APL logo.
"APL Matrix" — the backup option.

The official APL logo was designed by Adám Brudzewsky and was adopted by BAA at the BAA Webinar on May 19, 2022, thereby concluding a nine months long process.

The logo has no legal restrictions on usage and is available in vector and bitmap formats. Many kinds of merchandise featuring the logo can be bought online.

The logo can be experienced in various realistic web contexts, including as favicons:

  1. In a gallery of programming language logos
  2. On a mock conference website
  3. On a mock programming competition website (in monochrome)

Though a logo has now been chosen, this page documents the candidate designs for reference.

History

At the September 9th 2021 BAA webinar, the effort to adopt a universal vendor-agnostic logo for APL was initiated. This APL Wiki article was used as a portal for the work. Submission of concept work ran until the end of 2021, and voting for logos ran until 2022-02-10 at 16:15 UTC.

At the 2022-02-10 BAA Webinar, the results were revealed and discussed. Ignoring obvious spam votes, the clear winner was Nested Bitmaps. For a second place, APL Matrix seems to have won, unless counting Lamp Box and Lamp Rho Downstile Box are counted as a single proposal for small-size and larger uses respectively.

It was decided to go with the Nested Bitmaps concept for now, with APL Matrix as a backup in case Nested Bitmaps is found to conflict with Apple Inc.'s logo. It was also observed that Lamp Box, modified to have sharp corners and a darker background, could be seen as the bottom left part of APL Matrix, for use at small sizes.

As with all candidates, the winners are not considered final designs; exact execution, colours, and fonts (including whether or not to stylise the letters "APL" as ⍝⍴⌊. During the 2022-02-24 BAA webinar, it was decided to go ahead with the Nested Bitmaps logo, and a couple of attendees were tasked with finding pricing for professional designers to polish it. On 2022-03-11, BAA hired such a designer for the task.

The designer went with a uniformly coloured apple, which led to the idea of shrinking the letters to fit them entirely inside their blocks, avoiding the issue of touching the background colour. Finally, during the 2022-05-20 BAA webinar, the attendees voted to replace the blocky bitmap font with a traditional Clarendon, matching the old IBM manuals, and the new Fortran logo.

Criteria

The choice of logo concept was to be done while keeping in mind that a common logo is intended for branding demonstrations, presentations, systems, documentation, and other visual materials. Its core purpose is to proclaim that "this is APL in action". Furthermore, it should work as a favicon (possibly slightly modified to fit the technical constraints) as well as in banners, including on both dark and light backgrounds. It was also seen as beneficial if the final logo could easily be adapted to a monochrome form, for usage in printed materials, stencils, and existing designs. The chosen logo does indeed permit such uses.

It was established that the ideal logo was signal that:

  1. this algorithm/product/person/company uses APL for increased brand recognition
  2. APL is a programming language as opposed to any of the other things named APL
  3. APL is a sophisticated IT tool which delivers tangible benefits

Logos based on apples

50yearsapple.png 50 Years Apple

50yearsapple.png

This is based on the logo that Dyalog Ltd. commissioned for APL's 50th anniversary, which was inspired by the original "I like APL" apple motif; the green colour also recognises this original motif. As with some of the other suggestions, the simplicity and single colour means that it would still work well when shrunk to the size of a favicon and could be rendered in black and white without loss of detail.

Click here to leave feedback on this logo.


Angular Textured Apple.png Angular Textured Apple

Angular Textured Apple.png

This apple-based logo is designed by Aaron Brudzewsky. It uses realistic textures exclusively, for a crisp fresh look. The angles and orthogonally constructed letters hint at APL's emphasis on orthogonal arrays.

Click here to leave feedback on this logo.


Circles.png Circles

Circles.png

This is stylised enough not to get in trouble with Apple Inc, while still being a recognisable development of the traditional symbolism. The italic Clarendon and the Carbon red and green are honouring APL's IBM heritage.

Click here to leave feedback on this logo.


APL logo light.png Cube Apple

APL logo light.png

This is a cube, which is a common APL motif, e.g. used for APL2 (including the book APL2 at a glance), APL*PLUS and Dyalog APL. However, one quarter has been modified to resemble a leaf, thus making the cube into an apple, another common association with APL. The leaf is supposed to hint at the Del which symbolises function definition and has been used in application icons for APL+ and APLX. The green colours come from IBM's modern Carbon design to honour IBM's role APL's history. The lettering spells out "APL" while also hinting at APL's usage of special glyphs; here ⍝⍴⌊ which look very close to the forms found in the widespread APL385 Unicode font.

This may be too reminiscent of the Dyalog APL application logo to be a general and independent APL logo.

Click here to leave feedback on this logo.


Jokerman logo.jpg
Jokerman

Jokerman logo.jpg Logo from the LinkedIn APL - A Programming Language group featuring the letters "APL" in the Jokerman font, but with the dot in the letter L replaced by an apple.

Click here to leave feedback on this logo.


Nested bitmaps logo.png Nested Bitmaps

Nested bitmaps logo dark.png
Alternative nested bitmap logos
Nested bitmaps logo.png

This logo is a reinterpretation based on the classic APL apple with the leaf styled as a filled Del which symbolises function definition and has been used in application icons for APL+ and APLX. The green colour comes from IBM's modern Carbon design to honour IBM's role APL's history. The apple is subdivided into a rectangular pattern which is supposed to invoke a matrix and the middle row in turn holds three 4-row, 3-column Boolean matrices to spell out "APL" as bitmaps. This matrix of matrices hints at APL's multi-dimensional nested arrays. The logo exists in various variations.

This logo relies on contrast contrasts in a way that necessitates having two parallel logos, one for light backgrounds and one for dark backgrounds.

Click here to leave feedback on this logo.


Script logo.png Script apple Script logo filled.png

Script logo.png
Script logo filled.png

This apple logo is a basic update of IBM's classic "I like APL" promotional, but with the leaf styled as a filled Del which symbolises function definition and has been used in application icons for APL+ and APLX. The colours comes from IBM's modern Carbon design to honour IBM's role APL's history. The script lettering commemorates APL's origins as handwritten notation and at the same time symbolises the ease with which APL is written. On dark backgrounds, the lettering would be produced in white rather than black. The logo also exists as a filled green version.

For good and for bad, Dyalog Ltd has already adopted a slight variation of this for use as the APL Seeds logo (user meetings, events and information specifically for new APLers) – see here for an example and the detail makes it harder to shrink. Some think the filled version is more reminiscent of a bell pepper than an apple.

Click here to leave feedback on this logo.


Logos based on grids

APL matrix logo.png APL Matrix Matrix logo.png APL matrix logo Clarendon.png APL matrix logo Plex.png

APL matrix logo.png
Matrix logo.png  APL matrix logo Clarendon.png  APL matrix logo Plex.png

This logo is inspired by the logos of TypeScript, JavaScript, and WebAssembly, being lettering along the bottom of a theme coloured square. The APL logo is distinct in its usage of Lamp Rho Downstile and in splitting up the square into subsquares to hint at APL's multi-dimensional arrays. The colour of the centre square is from IBM's Carbon design and occupies the saturated green gap in the rainbow of programming language logos. For small icons, the lettering can be left out. As an alternative to the Lamp Rho Downstile, the letters could be shown in a proper font like the traditional IBM user guide cover sheet font Clarendon (as used in the Fortran logo), or the modern IBM programming font Plex Mono.

Click here to leave feedback on this logo.

OOQQ APL bright green proposal.jpg APL Rotated Array APL dots proposal.jpg Rotated Array with APL.png

OOQQ APL bright green proposal.jpg

APL dots proposal.jpg Rotated Array with APL.png

Following the central ideas of "Array-Based" Language, the three letters of the name, and the most established APL logo to date (the APL Wiki one); This logo tries to encompass and simplify all of them, while the rotation and the negative space hints the nature of the multi-dimensional arrays that APL is founded on. The colour is green, hinting the IBM Carbon green lettering, begin friendly with hard reproduce surfaces that will need a black-and-white version, and also becoming the only green logo in the programming language landscape. Also exists in a darker version. Made by OOQQ

This logo does not spell out "APL" and while there are three central circles, they are likely too far apart to frame one letter each. A solution, would be to put them on the diagonal

Click here to leave feedback on this logo.


APL Wiki Touch Square.png APL Wiki APL LOGO Black.png APL LOGO 2aac50ff.png

APL Wiki Touch Square.png

APL LOGO Black.png APL LOGO 2aac50ff.png

The APL Wiki logo encapsulates features of APL, is visually striking and takes an interesting new approach over traditional apple or cube designs. Its use here has already established its independent, community-wide use. It works in a variety of sizes and its simple black and white palette makes it suitable for all media forms. This logo could be enhanced with the letters "APL" either underneath, or within the middle dots of the middle row, and optionally stylised as the classical APL glyphs ⍝⍴⌊. It could also be recoloured in IBM's modern Carbon green.

Clearly, if you visit the APL wiki you'd expect to see the APL logo - and perhaps you already do.

Click here to leave feedback on this logo.


Logos based on the letters APL

Apl arrayness.png
APL Array

Apl arrayness.png

This logo represents an array and the letters A, P, and L, which together make up the array.

Click here to leave feedback on this logo.


APL Germany.jpg
APL Germany

APL Germany.jpg

The icon used by APL Germany.

It might be unclear whether the name is "ALP" or "APL".

Click here to leave feedback on this logo.


DirectionAndMagnitude.png Direction and Magnitude

DirectionAndMagnitude.png

The colors are taken from the Canadian flag.

Click here to leave feedback on this logo.


Display matrix.png Display matrix Display matrix green.png

Display matrix.png
Display matrix green.png

This is the output from the classic DISPLAY function when applied to the matrix 1 3APL.

If placed in the matrix of other logos, it would stand out a bit because of its simplicity. A good graphic designer could stylize it a bit, perhaps removing some white space, a little kerning on the letters, some color, etc. The font could also be replaced with an older font where the characters are more italicized or even underscored. The frame might be improved if the arrows and the lines were connected without breaks.

Click here to leave feedback on this logo.


Ligature Original.jpg Ligatures Ligature Separated.jpg Ligature Separated Aligned.jpg Ligature AP.jpg

Ligature Original.jpg

Ligature Separated.jpg Ligature Separated Aligned.jpg Ligature AP.jpg

This is Jon McGrew's reworks of an original design by Joseph DeKerf that used the ITC Avant Garde font. The original is arguably ambiguously APL/ALP, hence the alternative versions.

Click here to leave feedback on this logo.


Apl logo1.PNG Modern Apl logo2.png

Apl logo1.PNG
Apl logo2.png

This logo follows the style of the logos of JavaScript and its relatives/derivatives, but can optionally be made to stand out more with the distinctive power glyph.

The star when used in a flag-like context, may have negative connotations to some.

Click here to leave feedback on this logo.


Parallel Lines.png Parallel Lines

Parallel Lines.png

This logo is from the cover of the original edition of Paul Berry's SHARP APL Reference Manual.

This might appeal to those who have fond memories of the rather brilliant book, some would consider the design very dated, and it can be hard to read unless you already know that it says "APL". It also doesn't render well when small, and would need modification to work in a monochrome setting.

Click here to leave feedback on this logo.


Plain Ellipse.png Plain Ellipse

Plain Ellipse.png

This is a plain ellipse designed by Juda Brudzewsky. It is similar to the logo of PHP, using the warning red from IBM's Carbon design. The font is reminiscent of Clarendon used for the covers of IBM's manuals at the time when APL first appeared. Note that APL\360's name was originally always styled in italics, technology permitted.

If this logo concept is chosen, it should have a different colour than red, to avoid being overly similar to the logo of APL Media.

Click here to leave feedback on this logo.


APL GreyScale960(2).png
APL Shape APL Bronze960Black.png APL Bronze960White.png

APL GreyScale960(2).png

APL Bronze960Black.png APL Bronze960White.png

The thinking here is an APL Logo for general use and promoting the APL language has to be distinctive (so people notice and remember it), has to include the letters APL (as the people we want to attract will mostly not know what APL is), has also to include the words "A Programming Language" (to destinguish it from other instances of "APL") and should ideally be in 3D or use some other means to emphasize that APL can process Arrays with complex structures and multiple dimensions. The challenge is to get all that into 120 pixels - assuming that is indeed the typical size for the Logo in use. This is a first stab and lots of variants of this basic idea are possible, bronze with black or white backgrounds, for example; which I happen to like but has the additional benefit that no other Program Language Logos use this colour. It shows up well at 16 pixels on a white background, but not on black, sadly.

The phrase "A Programming Language" estabishes that the main logo says "APL", but further work to emphasize this point would be useful.

Click here to leave feedback on this logo.


AplBox.png
Letters From the Cube AplBoxGreenW.png AplBoxGreenB.png AplBoxGreenW nofill.png AplBoxGreenB nofill.png

Letters From The Cube

AplBoxGreenW.png AplBoxGreenB.png AplBoxGreenW nofill.png AplBoxGreenB nofill.png

Simple 3D logo from the imagination. The variants on the right are renderings of 4-by-4-by-4 Binary voxels. Each letter A, P, and L, are projections of that cube as follows:

     b4 4 4(5 ¯2 6 ¯3 1 ¯8,2312¯3 1)\'⎕'  (/b)(b)(/[2]b)
 ⎕⎕⎕⎕  ⎕⎕⎕⎕      
             
 ⎕⎕⎕⎕  ⎕⎕⎕⎕      
          ⎕⎕⎕⎕

It might be unclear whether the name is "ALP" or "APL".

Click here to leave feedback on this logo.


Logos based on APL glyphs

3D Lamp Rho Downstile.png 3D Lamp Rho Downstile

3D Lamp Rho Downstile.png

This is a variation on the APL Germany icon, created by Tobias Wessels after Dieter Kilsch proposed it during the APL Germany meetup in November 2021. It takes the idea of using ⍝⍴⌊ as stylised letters "APL" and combining them into a 3D structure, alluding to APL's multi-dimensional arrays. It should be noted that it is intended as a rough draft, and that both final design and colour choices are subjust to evaluation by a professional logo designer.

Click here to leave feedback on this logo.

LampBox.png Lamp Box

LampBox.png

This back-to-basics logo consists of a boxed Comment glyph, which is recognisable for all APL programmers. Non-APLers should be able to guess with language it represents based on it also being a stylised A for APL (and removing P and L makes include A+ better). It uses the IBM green but works fine when rendered in black-and-white or black-on-bright or white-on-dark. It also remains very legible in small sizes, like when used as a favicon.

This could be used in combination with Lamp Rho Downstile Box, this one being used for small sizes like for favicons.

Click here to leave feedback on this logo.

LampRhoDownstile.png
Lamp Rho Downstile

LampRhoDownstile.png

IBM Carbon green lettering of "APL" stylised as APL's glyphs ⍝⍴⌊ in a manner that is very close to the forms found in the widespread APL385 Unicode font.

Click here to leave feedback on this logo.


LampRhoDownstileBox.png
Lamp Rho Downstile Box LampRhoDownstileBlocky.png LampRhoDownstileBox16Zoom.png

LampRhoDownstileBox.png

LampRhoDownstileBlocky.pngLampRhoDownstileBox16Zoom.png

A version of the Lamp Rho Downstile logo in a box with matching rounded corners. This has the benefit of working well in 16px icon size, but can also be custom drawn as pixel art. Variations include a brutalist version and zoomed pixel art with or without faint grid.

This could be used in combination with Lamp Box, that one being used for small sizes like for favicons.

Click here to leave feedback on this logo.


QuadAPLAlt.png Quad APL QuadAPL.png

QuadAPLAlt.png
QuadAPL.png

This is the design by LdBeth that plotted by the MetaPost program below. It is composed visually by Quad, And, Circle (Pi), Left Tack, and forms the stylized "APL". One day he needs an icon for his APL keyboard layout, and he spent an hour to do the sketching and wrote the code in his favorite font design tool MetaFont. The right one is the old, original one. There might be alternative glyphs, and he will gladly accept any interesting suggestions for improvements.

MetaFont code converted to MetaPost for vectorized output.
% show bound box
prologues := 2;
beginfig(1);
  % edge
  e=5;
  a=40;b=28;
  % misc points
  m=0.3a;n=0.5b;t=2;
  % center
  z0=(e+n,e+0.4a);r=7;
  % quad
  z1=(e,e);z2=(e,a+e);z3=(b+e,a+e);z4=(b+e,e);
  % and
  z5=(e+t,e+m);z6=(e+n,e+0.8a);z7=(e+b-t,e+m);
  % pi
  z8=z0+(0,r);z9=z0+(r,0);
  z10=z0-(0,r);z11=z0-(r,0);
  % left
  z12=(z1+z4)/2;z13=z10-(0.3b,0);
  % draw
  pickup pencircle scaled 3;
  draw z1--z2--z3--z4--cycle;
  draw z5--z6--z7;
  draw z8..z9..z10..z11..cycle;
  draw z0--z12; draw z10--z13;
endfig;
end

This logo may be too cryptic, as neither the name APL, nor individual APL glyphs are very distinguishable.

Click here to leave feedback on this logo.