Identification

• A file with the .vi file extension is known as a virtual instruments file.
  
  

Source

• Vi files are associated with LABView, a software program created by National Instruments.
  
  

Function

• A file with the .vi file extension contains data needed to operate a function that replaces the need to use a traditional diagnostic testing device. The .vi file extension serves as a marker to your computer, signaling that the file requires LABView to be accessed.
  
  

Use

• Vi files can be used to perform certain functions, such as measuring voltage in place of a multimeter or frequency instead of an oscilloscope.
  
  

Systems

• Vi files and LabVIEW can be used on Windows, Mac OS and Linux-based computers.