New with Dyalog v20.0: ⎕SHELL enables execution of external programs with more control and options than those provided by ⎕SH/⎕CMD. Discover more at https://www.youtube.com/watch?v=wEfS1zhb97Q

Dyalog delivers a world-class APL development environment that allows both Subject Matter Experts and IT specialists to efficiently convert their ideas into software solutions.
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New with Dyalog v20.0: ⎕SHELL enables execution of external programs with more control and options than those provided by ⎕SH/⎕CMD. Discover more at https://www.youtube.com/watch?v=wEfS1zhb97Q

Season's Greetings from all of us at Dyalog Ltd, and Merry Christmas to all those who celebrate it – we hope you have a peaceful and joyous day.
The presentation recordings from DYNA Fall 2025 are now being published. Watch (or rewatch!) "What is the APL Trust?" by Diane Hymas, one of the founding directors of The APL Trust https://www.youtube.com/watch?v=WT6_1bAYL-8


#APLQuest 2014-01: Write a function that takes a character vector and removes the interior vowels from each word. (https://apl.quest/2014/2/ to test your solution)

The presentation recordings from DYNA Fall 2025 are now being published. Watch (or rewatch!) "ArrayLab: Building a 3D APL Game with raylibAPL" by Holden Hoover, a student at the University of Waterloo, at https://www.youtube.com/watch?v=N6YxjhJFMSw

The presentation recordings from DYNA Fall 2025 are now being published. Watch (or rewatch!) "What Can Vectorised Trees Do for You?" by Asher Harvey-Smith at https://www.youtube.com/watch?v=i6GCcCosUjE


∆←{⎕A[⍵]} ⋄ ∆ 8 1 16 16 25 ⋄ ∆ 2 9 18 20 8 4 1 25 ⋄ ∆ 11 5 14
Today we celebrate 105 years since the birth of Ken Iverson, creator of APL. Discover more about this visionary and Turing Award winner at https://en.wikipedia.org/wiki/Kenneth_E._Iverson