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. 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.
- Data files
- - / -
- ac2, ac3, ac4, ac5, ac6, ac7, ac8, ac9
- SPICE AC/Frequence Data related extensions:
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:
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:
- WebCGM ACI File
- GNU Autoconf Input File
- CaseWare Working Papers Client File
- EditPlus Auto Completion Data
- Alfresco Content Package
- Adobe Photoshop Custom Swatch
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
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