A file with .dsc extension is a text description file that contains information about the software that it comes with. It may contain text related to the product description, data parameters, minimum system requirements, or to other associated readme file. With the passage of time, DSC files have long been replaced by readme files that come bundled with the applications and contains instructions about any pre-launch setup of the software. DSC files are saved as plain text files and can be opened in popular text editors such as Microsoft Notepad, Notepad++, and Apple TextEdit.
DSC File Format - More Information
DSC files are created and stored to disc as plain text files. These can be edited by opening in any compatible text editors such as Microsoft Notepad. DSC follow plain text format similar to .txt files and can be populated with any details of the software as per the software functionality or instructions.