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FN file format description

FN file format

We made this page to help you understand how to work with FN files. Here, you can find info on software that can handle these files. It includes simple programs for opening and converting them.

Learn about the FN file and its functions here!

We also explain how to convert them into other types. It's simple and hassle-free. For opening or changing FN files, this page offers all the tools you need.

#1 STK Facility Networks File

The FN file is categorized under Data. It is associated with Systems Tool Kit, serving as a STK Facility Networks File. STK (Systems Tool Kit) is a physics-based software geometry engine that accurately displays and analyzes land, sea, air, and space assets in real or simulated time. Visit the website of Systems Tool Kit for a detailed description of the FN format.

Application:Systems Tool Kit
Category:Data files
Mime-type:application/octet-stream
Magic:- / -
Aliases:-

STK Facility Networks File related extensions

  • sif KilnView Log Signature
  • hzd SeisWorks Horizon Datafile
  • ccs TrialDirector Clip Script
  • u08 UFile 2008 Tax Return Data

#2 GCL Cross Referencing Data

The FN file is categorized under Development. It is associated with GNU Common Lisp, serving as a GCL Cross Referencing Data. GCL (GNU Common Lisp) is the GNU Project's Common Lisp compiler. The .fn file contains cross referencing information as well as information useful to the collection utilities in cmpnew/collectfn. Visit the website of GNU Common Lisp for a detailed description of the FN format.

Application:GNU Common Lisp
Category:Development files
Mime-type:application/octet-stream
Magic:- / -
Aliases:-

GCL Cross Referencing Data related extensions

  • rqs Micro Focus Revolve Script
  • bxl Turbo-Basic XL Source Code
  • ipch Intellisense Precompiled Header
  • spy WinTECH Socket Spy Log

Did someone accidentally misspell the FN filename?

The FN filename extension may be misspelled. We compiled a list of similar file extensions to help you find errors.

Filename extensions similar to FN:

Windows can't open your FN file?

When you try to open a file by double-clicking it, Windows looks at the file's name to figure out what to do. If Windows doesn't know the file type, it'll ask you to choose an app to open this FN file.

To set the FN file association in Windows 11, you can follow these steps

  1. Open the Settings app by clicking on the Start menu and selecting the gear icon.
  2. In the Settings app, click on System and then select Apps from the left-hand side menu.
  3. Scroll down and click on the Default apps option.
  4. In the Default apps section, you will find various categories. They include Email, Web browser, and Music player.
  5. Locate the category that matches the file type you want to associate. For example, choose Photos for image files, or Video player for video files.
  6. Click on the current default app listed under the category. A list of available apps will appear.
  7. Choose the app you want to set as the default for that file type. If the app you want is not listed, click on More apps to see more options. Or, click on Look for an app in the Microsoft Store to search for apps.
  8. After selecting the app, it will become the default choice for opening files of that type.

It's worth mentioning that you don't always need to set FN file association. Many apps can open files. They don't need a specific file association to be set.

Handle FN files with care

Exercise caution when handling FN files from unknown sources. Files from certain sources can threaten your computer's security. They might contain malware, viruses, or harmful software. To minimize risks, avoid downloading or opening unfamiliar FN files. Use trusted antivirus software to scan files from unknown sources before opening.

If you find the information on this FN page useful, please feel free to link to this page.

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