AC9 file format description

Many people often share .ac9 files without providing instructions on how to use them. This can make it difficult for users to determine which program is compatible for editing, converting, or printing .ac9 files. To address this issue, we have created this page to offer assistance and guidance on handling .ac9 files. We provide information on compatible software, editing instructions and conversion options to help users effectively interact with .ac9 files.

Our aim is to simplify the process and promote seamless use of the .ac9 file format.

1 filename extension(s) found in our database.

.ac1 - SPICE AC/Frequence Data

The AC1 data files are related to SPICE. The AC1 file is a SPICE AC/Frequence Data. SPICE (Simulation Program with Integrated Circuit Emphasis) is a widely-used circuit simulation program. It was developed as public domain software at the University of California and versions 2G6 (vanilla SPICE) and 3.0 are still used.

Application:SPICE
Category:Data files
Mime-type:application/octet-stream
Magic:- / -
Aliases:ac2, ac3, ac4, ac5, ac6, ac7, ac8, ac9

SPICE AC/Frequence Data related extensions:

  • ac1 SPICE AC/Frequence Data
  • csdf SPICE Common Simulation Data Format File
  • dc SPICE DC Data
  • ic SPICE Initial Condition Data
  • st0 SPICE Status Data
  • sw0 SPICE Sweep Operations Output Data

Be careful.

It is important to understand that the .ac9 file extension is not limited to a particular set of applications. Other programs besides the intended ones can also use the .ac9 extension to create files. This includes potentially harmful programs or malware that may generate .ac9 files for various purposes. Be especially cautious with .ac9 files coming from untrusted or unknown sources.

Can't open a .ac9 file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize an extension, you receive the following message:

Select an app to open this .ac9 file

To set the .ac9 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. Under the Default apps section, you will find various categories such as Email, Web browser, and Music player.
  5. Locate the category that matches the file type you want to associate, such as 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 desired app is not listed, click on More apps to see additional options or click on Look for an app in the Microsoft Store to search for apps in the Store.
  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 .ac9 file association. Many applications can open .ac9 files without requiring any specific file association to be set.

The .ac9 file extension is often given incorrectly

Based on searches conducted on our site in the past year, we have compiled a list of the most common misspellings. These frequent misspellings can cause confusion and hinder search accuracy. Our goal in providing this list is to help users find the right information more easily and enhance their overall search experience on our website.

These misspellings were the most common in the past year:

ac, aci, aco, acp

Is it possible that the filename extension is misspelled?

There is a possibility that the .ac9 filename extension is misspelled. To assist users in identifying potential errors, we provide a list of similar file extensions in our database.

Filename extensions similar to .ac9:

Operating systems

At DataTypes.net, we strive to provide a seamless user experience by ensuring compatibility with a wide range of operating systems. The following is a comprehensive list of the operating systems currently supported by DataTypes.net:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

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