Notes about the USI file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
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.
Important: Invalid file associations could be the result of underlying issues within your Windows PC. It is highly recommended that you scan your PC for invalid registry entries, unused processes and other slowdown issues.