Files with fno extension are associated with an old program Infobase

There is one other file type using
the FNO file extension!

empty icon.fno - Atlast File Notes Organizer CSV data file

Detailed description

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FNO file extension - Folio Infobase file

What is fno file? How to open fno files?

File type specification:

Various data file type icon Various data file type

The fno file extension was used by older program known as Infobase, an application and data format that appears to be very popular among various governmental agencies. It is apparently also used to produce many CD/DVD titles. 

Help how to open:

The fno extension file is not meant to be opened manually by the user.

How to convert:

Files with fno extension are not convertable.

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