What is a ULP File Type?
You use ULP files to create custom functions. It can be used to modify internal EAGLE data, generate data and execute d'sequences; instruction. The program includes ULP files but you can also download them from the Autodesk web site.
To create a ULP file select File → New → rLP, add your content, select File → Save as..., File name, choose a backup location, and click Save.
To open a ULP file, navigate to the file in the Control Panel and double-click on it. You can select File → Open → ULP..., navigate to the file, and click Open.
Autodesk EAGLE was formerly known as CadSoft EAGLE. It was purchased by Autodesk in 2016. Easily Applicable Graphical Layout Editor is the abbreviation for EAGLE.