AC9 file format description

Many people share .ac9 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .ac9 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .ac9 files.

1 filename extension(s) found in our database.

.ac1 - SPICE AC/Frequence Data

The AC1 data files are related to SPICE. 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

Naturally, other applications may also use the .ac9 file extension. Even harmful programs can create .ac9 files. Be especially cautious with .ac9 files coming from an unknown source!

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 a filename extension, you receive the following message:

Windows can't open this file:

example.ac9

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

Open Control Panel > Control Panel Home > Default Programs > Set Associations.
Select a file type in the list and click Change Program.

The .ac9 file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

ac, aci, aco, acp

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

.aci: WebCGM ACI File
.ac: GNU Autoconf Input File
.ac: CaseWare Working Papers Client File
.ac: AC3D Model
.acp: EditPlus Auto Completion Data
.acp: Alfresco Content Package

Operating systems

DataTypes.net currently supports the following operating systems:

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

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

https://datatypes.net/open-ac9-files

If you have useful information about the .ac9 file format, then write to us!