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Pick the Right Program
Start by choosing the right program to open your A3O file. The most common program used to open A3O files is listed below. At a minimum, this program should be able to open your A3O file:
- Binary Data
Note the File Type
Other programs may be able to open your A3O file, depending on the type of file it is. You can find the file type listed in the file’s properties. On a Windows PC, right-click the file, click "Properties", then look under “Type of File.” On a Mac computer, right-click the file, click “More Info,” then look under “Kind”.
Tip: If it’s the A3O file extension, it probably falls under the Uncommon Files type, so any program used for Uncommon Files should open your A3O file.
Ask the Developer
Contacting the software developer is another easy way to get help opening a A3O file. You can find the developers for the most common programs used to open A3O files in the list below.
| Software | Developer |
|---|---|
| Binary Data | Microsoft Developer |
Use a Universal File Viewer
When all else fails, a universal file viewer is the best way to open a A3O file. Programs like File Magic (Download) can open many different types of files, depending on the format. Although, some files may not be compatible with these programs. If your A3O file isn’t compatible, it will only open in binary format.
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1File types that are unsupported can be opened in binary format.
