DYNA Fall 2025: 29-30 September. More info

Dyalog Ltd
Downloads icon
Video Library icon
Dyalog Support Service icon
Search icon
Dyalog D Logo
A view over Bergen, Norway, showing colourful buildings, lush green trees, and a calm river winding through the city with hills in the background under a partly cloudy sky.

ECOOP 2025 – Presenting APL Standards and Array Notation

The European Conference on Object-Oriented Programming (ECOOP), Europe’s longest-standing annual programming languages conference, brings together… Read

DYNA Spring 2025: A Review

Earlier this month we hosted a DYNA (Dyalog North America) event. We returned to the same venue as DYNA24, and again had a capacity crowd. The day started with… Read

Dyalog ’24 Videos: Week 6 – Remembering the “Old”, Welcoming the “New”

The main theme this week is remembering how we got here – and welcoming a new generation of APL users. There are three talks and a panel discussion… Read

Dyalog ’24 Videos: Week 5 – Best Practices

Most of the recordings that we are releasing in week 5 concern “best practices” for the use of APL in large or complex systems. Many of these are… Read

Dyalog ’24 Videos: Week 4 – Migrating APL Code, and New GUI Frameworks

The presentations released this week are about APL applications on the move. Some applications are moving from one APL implementation to another, for example… Read

Dyalog ’24 Videos: Week 3 – The APL Forge, Education, and Data Science

The recordings released this week focus on activities related to attracting new users to APL. For many years, the APL Problem Solving Competition was a… Read

Dyalog ’24 Videos: Week 2 – New Functionality

The recordings released this week focus on active development projects at Dyalog Ltd. The first three presentations describe features that are expected to be… Read

Dyalog ’24 Videos: Week 1 – Welcome to the Dyalog ’24 Presentations!

We’ve finished processing the first recordings of the presentations given at Dyalog’24 in Glasgow. The first four are now available to watch, and you… Read

Dyalog ’23 Videos: Week 8 – Celebrate Solstice with the Last of Our Dyalog ’23 Videos

Whether you are celebrating a winter holiday, looking forward to the days getting longer from tomorrow, or enjoying summer south of the equator, we hope you… Read

Dyalog ’23 Videos: Week 7 – Performance and Scaling

Although run-time performance is rarely the most important reason for selecting APL, good performance often becomes important during the lifetime of an… Read

Dyalog ’23 Videos: Week 6 – Tools and Services

An increasing number of APL systems serve business logic as services, in addition to providing a user interface. Some recent APL applications have no user… Read

Dyalog ’23 Videos: Week 5 – Tools and Interfaces

This week, the focus is on the use of tools and interfaces in applications. Mark Wolfson from BIG integrates data from 1,000 retailers to provide business… Read

Dyalog ’23 Videos: Week 4 – Research and Education

I am always thrilled to hear from people who have been able to use APL to gain insight into difficult subjects, or use APL to pass knowledge on to others. A… Read

Dyalog ’23 Videos: Week 3 – Dyalog Core Development

This week’s collection consists of presentations by members of the development team, and concentrates on language features and development tools that the… Read

Dyalog ’23 Videos: Week 2 – APL Problem Solving Competition

The section that is dedicated to the annual APL Problem Solving Competition is always one of my own favourite parts of a Dyalog user meeting, and the talks by… Read

Welcome to the Dyalog ’23 Videos!

Welcome to the 2023 edition of the Dyalog user meeting presentation recordings. This year, we plan to release a few talks each week until the Winter Solstice… Read

Dyalog ’23 Day 5: The End, Yet Still Much More to Do

In his second presentation of the week, Brandon Wilson relayed some of his experiences as a relative newcomer to APL and Dyalog. Having heard that most users… Read

Dyalog ’23 Day 4: So Many Problems to Solve

We started Wednesday with an update to the co-dfns project by Aaron Hsu. Aaron is trying to make APL more accessible to more people for tackling more problems.… Read

Dyalog ’23 Day 3: Quantum, Human, and Network Communications

Tools Architect Brian Becker started today’s presentations with an overview of the tools provided by Dyalog Ltd. to help develop applications. He also… Read

Dyalog ’23 Day 2: Looking Into the Future

The weather improved today – the sunshine was a refreshing feeling as we awoke to a new day of forward-thinking presentations. As usual, we began with Gitte… Read

Dyalog ’23 Day 1: Welcome to Denmark!

We have returned to the (very windy this time!) shores of Elsinore in Denmark for our annual user meeting, Dyalog ’23! Today saw the usual range… Read

APL Seeds ’23: Wednesday 22 March

Last Wednesday we hosted APL Seeds ’23, the third of our free online user meetings aimed at new and prospective users of APL. In attendance was a mix of… Read
Jesús Galán López stands at a podium with a laptop, giving a presentation at Dyalog ’22. The slide on the large screen is titled “Computational problems in Materials Science and Engineering” and shows an “Analysis of tensile data” flow diagram with code files and functions related to data processing. The audience is seated at tables, watching the talk.

Dyalog ’22 Day 5: Looking Forward

Links to recordings from this day of the user meeting are at the bottom of this post. To begin the final day of the user meeting, Aaron Hsu presented some… Read
Delegates enjoying the afternoon sun at Quinta dos Vales winery in the Algarve, Portugal, surrounded by sculpture gardens, palm trees, and vineyard views during Dyalog '22.

Dyalog ’22 Day 4: Celebrations

Links to recordings from this day of the user meeting are at the bottom of this post. The third day of presentations kicked off with Brian Becker running us… Read
Karta Kooner presenting at Dyalog '22 in Olhão, Portugal, discussing performance analysis within the Dyalog interpreter, standing beside a podium with a laptop.

Dyalog ’22 Day 3: Automation, architecture and performance

Links to recordings from this day of the user meeting are at the bottom of this post. Automation, architecture and performance were throughlines of the second… Read
Gitte Christensen, Managing Director of Dyalog Ltd, smiling as she welcomes attendees to the Dyalog '22 user meeting in Olhão, Portugal, standing at a podium with a laptop.

Dyalog ’22 Day 2: Welcome Back to User Meetings

Links to recordings from this day of the user meeting are at the bottom of this post. We were welcomed to the 2nd day of the user meeting by managing director… Read
View of the central promenade at Marina Village in Olhão, Portugal, flanked by modern apartment buildings with palm trees lining the walkway under a clear blue sky.

Dyalog ’22 Day 1: Welcome to Sunny Olhão!

Arriving to meet the warm sea air is already a refreshing change as this year’s long, hot summer started to close in the weeks leading up to this… Read

APL Seeds ’22: Tuesday 29 March

On Tuesday 29 March we hosted APL Seeds ’22, the second annual online event for new and prospective users of APL (although everyone was welcome). Once… Read

APL Seeds ’21: Wednesday 31 March

Last Wednesday we hosted APL Seeds ’21, an event for those just starting their APL journey. Although we knew we had a good programme with some… Read
A speaker presents a slide to an audience in the main lecture hall at Konventum during Dyalog ’19. The room features tiered wooden seating, abstract wooden ceiling panels with built-in lighting, and a large projection screen on the right. Attendees are seated throughout the hall, listening and taking notes.

Dyalog ’19: Thursday 12 September

Dyalog Pictures Ltd? After a wonderful banquet dinner bonding with fellow teammates of last night’s Viking Challenge, we were invited to the Jorns… Read
Professional Prize winner Torsten Grust holds a microphone and a certificate while speaking on stage at Dyalog '19.

Dyalog ’19: Wednesday 11 September

Floaty balls In contrast with Monday night’s brain-bending puzzles, last night there was some lighter entertainment as Richard Park presented his… Read
Roberto Minelli and Pietro Bulleri stand at a podium in a lecture hall at Konventum, presenting to an audience. A large screen behind them displays the title “A Puzzle League.” Attendees are seated in rows, watching the talk, with a whiteboard showing handwritten notes on the right-hand side.

Dyalog ’19: Tuesday 10 September

2⍴⊂’APL’ Last night Roberto Minervini and his students Pietro Pio Palumbo, Gabriele Meroni and Alessandro Laselli of Liceo Scientifico GB… Read

Dyalog ’19: Monday 9 September

Dyalog ’19 talks begin As usual, we began the series of User Meeting talks with a warm welcome from Managing Director Gitte Christensen. This year… Read
A behind-the-scenes view at Dyalog ’19 showing a camera crew filming a group in a small meeting room at Konventum. Several attendees are gathered around a table with notes and coffee cups as short films about APL are recorded under warm lighting and a wooden ceiling.

Dyalog ’19: Sunday 8 September

Welcome back This year once again the Dyalog User Meeting returns to beautiful Elsinore in Denmark. The historic seaside city is home to Kronborg castle,… Read

Dyalog ’18 Videos, Final Week

Welcome to the eighth – and final – week of recordings from the Dyalog User Meeting in Belfast! I’d like to take this opportunity to thank all the… Read

New York Dyalog Meetup

I am very pleased to announce the creation of the New York Dyalog APL Meetup group, details of which can be found online at… Read

Dyalog ’18 Videos, Week 7

Our stated goal has been to provide variety each week, and I’m happy to say that I have not been able to find any kind of theme in this penultimate set… Read

Dyalog ’18 Videos, Week 6

Happy New Year – and Welcome to the 6th week of Dyalog ’18 video releases! If you enjoy geometry, 2019 starts with a couple of real treats; one which… Read

Dyalog ’18 Videos, Week 5

We are releasing four talks this week from Dyalog ’18 in Belfast. Three of them focus on techniques for deploying APL applications across all the… Read

Dyalog ’18 Videos, Week 4

This week is mostly a deep dive into the new world of storing source code in text files rather than workspaces and other “binary” formats. However,… Read

Dyalog ’18 Videos, Week 3

The four presentations from Dyalog’18 that we are releasing this week address both the visible (user interface) and invisible (performance) parts of… Read

Dyalog ’18 Videos, Week 2

Each week until early January, we will be releasing a selection of recordings of presentations from Dyalog’18, which was held in Belfast at the end of… Read

Diane’s Lasagne Problem

Making Lasagne Participants in the SA2 Performance Tuning workshop at the Dyalog ’18 User Meeting were encouraged to bring their own problems for the group… Read

Welcome to the Dyalog ’18 Videos!

Three weeks have gone by since we waved goodbye to the last Dyalog ’18 delegates in Belfast. We’ve had time to catch up on sleep, half of us have… Read

Dyalog ’17: Day 2 (Monday 11 September)

by Vibeke Ulmann Focus on Dyalog APL the language – Monday 11th September 2017 Where Sunday is traditionally filled with workshops and hands-on experiences… Read

Dyalog ’17: Day 1 (Sunday 10 September)

by Vibeke Ulmann SharpPlot and SharpLeaf – the graphics and publication tools included with Dyalog on all platforms (Workshop SA4) A lot of work has gone… Read

Snapshot blog from the last day at Dyalog’16 in Glasgow

#Dyalog16 – Vibeke Ulmann So we have come to the last blog from this year’s Dyalog User Conference. This is going to be a short one – as I can’t… Read

APL50 – celebrating the 50th Anniversary of the APL language

#Dyalog16 – Vibeke Ulmann Wednesday 12th October was dedicated to celebrating the 50th Anniversary of APL becoming an interactive programming language. And… Read

Report from Dyalog ’16 – Thursday

Today was the last day of the user meeting, a further half-day celebrating 50 years of APL, with presentations both looking back at the history of APL from its… Read
Abstract digital landscape with glowing teal and blue data visualisations, including charts, candlesticks, and vertical bars, evoking financial analytics and algorithmic structures in a futuristic grid-like environment.

Winning the 2016 APL Problem Solving Competition – Finance Category

#Dyalog16 – Vibeke Ulmann Today we had the third of the 3 grand prize winner presentations. Zack Batik is 23 years old and is in his second year studying… Read

Report from Dyalog ’16 – Wednesday

Today we started to celebrate APL’s 50 year history, looking at how it has developed since IBM created the first clear workspace on 27 November 1966,… Read
Close-up of a person working on a laptop displaying colourful DNA sequence data in a bioinformatics application, with scientific equipment, documents, and multiple monitors showing complex visual data in the background.

Winning the 2016 APL Problem Solving Competition – Bioinformatics Category

#Dyalog16 – Vibeke Ulmann Today we had the second of the 3 grand prize winner presentations. Marinus Oosters is 25 years old and is in his second year… Read

Cooking with Dyalog – Kai Jaeger (APL Consultant) and Stephen Taylor (Equiniti Claybrook)

#Dyalog16 – Vibeke Ulmann The presentation today was centred around the fact that many software programmers – and especially those who programme in… Read

Report from Dyalog ’16 – Tuesday

Last night’s whisky and chocolate tasting Last night’s dinner ended with a talk from Glengoyne, a highland distillery based fourteen miles north of… Read

Winning the APL Programming Contest – General Computing Category

#Dyalog’16 – Vibeke Ulmann Today we had the first of the 3 grand prize winner presentations. Joshua David is 19 years old and is in his second year… Read

The Calm before Stormwind – Tomas Gustafsson

#Dyalog16 – Vibeke Ulmann As announced earlier – and iterated many times by yours truly, to media and other interested parties, because it is SOOOOOOO… Read

Report from Dyalog ’16 – Monday

This year at the user meeting we have 106 attendees and a further 15 partners and guests, from 15 different countries worldwide. Today was the first day of… Read

Report from Dyalog ’16 – Sunday

It was a gloriously sunny day in Glasgow today. The Golden Jubilee Hotel overlooks the River Clyde and this was the view at sunrise: The day began with… Read

Report from Dyalog ’16 – Saturday

Welcome to Glasgow and to Dyalog ’16 – this year’s annual Dyalog user meeting, which is taking place at the Golden Jubilee Hotel on the banks of the… Read

Rencontres Dyalog APL 2016 – Paris, France

It is really good to see APL events come back to life! In April of 2014, we witnessed the re-birth of SWEDAPL, which had been dormant for some time – but now… Read
Group photo of attendees at the FinnAPL Forest Seminar 2016, gathered indoors and smiling with glasses of wine in hand.

FinnAPL Forest Seminar 2016

Finns probably have better reasons to look forward to spring more than most of us: not only does it get much easier to keep that hole in the ice open, it is… Read

Hacking with APL

Thanks to our dear friend Dr. Ray Polivka, Dan Baronet and I had the opportunity to travel to Vassar College to participate in their Community Hackathon held… Read

FinnAPL Meeting in Helsinki, November 26th 2015

Hyvää päivää (good day) On the last Thursday of November, I had the privilege to meet with with some members of the Finnish APL community in at the Vatt… Read

SWEDAPL Meeting in Malmö, November 11th 2015

The November cycle of APL User Meetings is kicking off; the SWEDAPL meeting in Malmö was first this year, holding a meeting at the top of the famous Turning… Read
Geoff Streeter walking in the foreground on a volcanic slope during a group excursion at Dyalog '15 in Sicily.

Dyalog ’15 – An Unexpected Viking Challenge

After many months of planning and preparation it was finally time to head from the UK to Sicily for Dyalog ’15. Sun, sea and an excellent conference… Read

Tuesday at Dyalog ’15

MiServer UI Controls Dan Baronet and Adám Brudzewsky continued yesterday’s presentation by Morten Kromberg on Cross-platform User… Read

TamStat, a Statistical Package

Blog post from presentation by Stephen M Mansour PhD, The Carlisle Group as well as the University of Scranton,  and Jerry Brennan PhD, A former teacher of… Read

Using Co-dfns to Accelerate APL Code

Blog post from Aaron Hsu’s (Indiana University, USA) presentation Wednesday 9th September. By Vibeke Ulmann #Dyalog15 For the past 2-3 years Aaron and… Read

How I won the Dyalog Programming Contest

Blog post from Arianna Locatelli’s presentation on how she won the Dyalog APL programming contest 2015. By Vibeke Ulmann #Dyalog15 Introduction Now it… Read

Highlights from User Presentation at Dyalog ’15 Tuesday 8th September

We have been spoilt with a large number of User presentations today, and although I have focused on writing more indepth about How to Save an Italian School… Read

Monday at Dyalog ‘15

There is so much going on at Dyalog ’15. The general theme of the day was set with Morten Kromberg’s Technical Road Map. Dyalog is constantly refining and… Read

How to Save an Italian School with APL

Blog post from presentation by Roberto Minervini with 4 of his students; Arianna Greco, Samuele Luigi Di Gioia, Kariman Admed and Silvana Maria Belén Colman… Read
Dyalog Ltd
Download Dyalog v19.0

Learn

Training and workshops icon

Products

Dyalog products

Pricing and Licences

Licence icon

For Business

Business intro icon

Community and Resources

Documentation icon

About Us

Duck icon
TryAPL
my.Dyalog
DyalogForums
Dyalog.tv
docs.Dyalog
Bluesky Icon
YouTube icon

Get tips and the latest news. We’ll never spam you. Unsubscribe at any time.

Copyright © 2004 – 2025 Dyalog Ltd.

The APL Trust
Get Support

Technical advice and assistance on all aspects of Dyalog usage is available by e-mail (support@dyalog.com) and/or telephone (+44 1256 830030 – limited to U.K. office hours). Limited advice on design and coding is available, but is not intended to replace the use of the printed and on-line documentation. Except when reporting an issue with the software, users are encouraged to seek advice from the user community via the Dyalog Forum (reading the content of the forums does not require membership).

Search our website...
Quick links:

Getting Started

/

Documentation

/

Downloads

/

Forums