>> OA3 file

OA3 file format description

Many people share .oa3 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .oa3 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .oa3 files.

1 filename extension(s) found in our database.

.oa3 - Fujitsu Oasys 3 Document

The OA3 document files are related to OASYS Viewer. OA3 file is a Fujitsu Oasys 3 Document. OASYS 100 (Office Automation SYStem) was the Fujitsu's first Japanese language word processor, announced as a Japanese language electronic typewriter in May 1980. All of Fujitsu's subsequent Japanese word processors were named "OASYS".

OASYS Viewer
Document files
- / -
Fujitsu Oasys 3 Document related extensions:
Fujitsu DexNet 200 Fax Document
RealVue 3D Packager Document
EximiousSoft GIF Creator Document
EViews Workfile
StereoLithography Data
DevCad CAM Pro Document

Naturally, other applications may also use the .oa3 file extension. Even harmful programs can create .oa3 files. Be especially cautious with .oa3 files coming from an unknown source!

Can't open a .oa3 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.

The .oa3 file extension is often given incorrectly!

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

oa, pa3, oar, oaw

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

OpenAccess Database
OpenSimulator Archive
OpenArchitectureWare Workflow Data

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.


If you have useful information about the .oa3 file format, then write to us!

Please help us by rating this page below.

3/5 based on 1 reviews.
Thanks for rating!
Invalid rating.