APL file transfer format
File type: Various data file
An aio file is a file used by APL (A Programming Language) for transferring data between APL systems.
Found 2 different file type records with the same aio filename suffix.
File type category:
Various data file
Date updated: October 12, 2026
Record marked as obsolete and not updated for a long time.
The aio file extension is associated with APL, a programming language designed by Kenneth E. Iverson at IBM.
An aio file contains data prepared for file transfer within an APL environment. It belongs to the older file-handling tools associated with APL rather than being a general-purpose interchange format.
The format is obsolete and is unlikely to be encountered in current APL software.
An aio file normally requires the original APL environment or a compatible legacy APL file-transfer utility. It is not intended to be opened as a regular document by a modern text editor or office application.
Because the format is obsolete, a current general-purpose program may not be able to open it directly.
If the file can be accessed with a compatible legacy APL environment, its contents may be imported there and exported in a format supported by that environment.
File type category:
Bitmap image file
Date updated: October 4, 2026
An AIO file is a bitmap image used by Axialis IconWorkshop, an icon-editing application from Axialis.
The format appears to be obsolete and may no longer be actively documented or supported by its developer. Axialis IconWorkshop for Microsoft Windows is the software associated with creating or opening these files.
On Microsoft Windows, open the file with Axialis IconWorkshop. If the file is not associated with the program, start IconWorkshop and use its Open command to select the AIO file.
Open the AIO file in Axialis IconWorkshop and export or save the bitmap in one of the image formats supported by that version of the program.
Software applications that handle other tasks involving aio files:
Microsoft Windows
Language
