An at2 file extension is related to the Adobe Persuasion (also known as Aldus Persuasion). An at2 file contains auto template.
There is one other file type using
the AT2 file extension!
.at2 - WinControl DCX-AT3000 motion control command language file
AT2 file extension - Adobe Persuasion auto template
What is at2 file? How to open at2 files?
The at2 file extension was used by now discontinued presentation program called Adobe (Aldus) Persuasion. Last version was discontinued in 1996.
An at2 file used in Persuasion contains some sort of template.