File Extension USI

.USI File

File extension: USI
File type: (found on Golden Orchard Apple II CD Rom)

Notes about the USI file extension:

To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened" (Windows 7) or "How do you want to open this file?" (Windows 10) if you double-click the file. There click on "More apps" and choose a suitable software to view such files on your PC or from email attachments.

The USI file type is primarily associated with 'Unknown Apple II File'.

Detailed information for file extension USI:

Primary association: Unknown Apple II File

Other applications associated with file type USI:

  • UsiXML (UI Description File) by Universite Catholique de Louvain-la-NeuveUsiXML (which stands for USer Interface eXtensible Markup Language and pronounced yousiksml) is an XML-compliant markup language that describes the UI for multiple contexts of use such as Character User Interfaces (CUIs), Graphical User Interfaces (GUIs), Auditory User Interfaces, and Multimodal User Interfaces. This association is classified as XML. The Mime types used with this association are: text/xml.

To change file associations press Windows Key + X and then Apps and Features > Default apps > Choose default apps by file type. Invalid file associations could be the result of underlying issues within your Windows PC.

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