What is .PSI file extension?
Shortcut to online help documentation for PrimalScript, a visual script development program; contains a subject header, file description, and links to online help.
PrimalScript's Nexis window displays the PSI file data as a folder. When opened, the contents of the PSI file are shown as a drop-down list of text and links.
You can see a list of software programs here on www.easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.