Open UPD File
The UPD is a type of text file that contains information about a specific program update.
Its function is similar to a README file or other basic TXT text file.
UPD is short for UPDate , which means that it is sometimes bundled with a software update installer.
Since these UPD files are essentially text documents, their content can be viewed by any word editing processor.
Users of Microsoft Windows based systems can use the Microsoft Notepad application to open and edit these UPD files.
Mac users can instead use Apple's TextEdit program to access the content of these files.
Linux users can make use of Geany, NotePad++ or any other available software.
It is even possible to open them from a command terminal, using a pre-installed text editor, such as vi, nano, etc.
UPD files may contain execution lines of some installation or update script.