A daily updated filename extension database!

OS3 file extension

The table below provides useful information about the .os3 file extension. It answers questions such as:

  • What is the .os3 file?
  • What program do I need to open a .os3 file?
  • How can the .os3 file be opened, edited or printed?
  • How can I convert .os3 files to another format?

Table of Contents

We hope you find this page helpful and a valuable resource!

1 extension(s) and 0 alias(es) found in database

✅ OS/2 Warp 3 System Data

OS/2 Warp 3 System Data .os3 file icon
OS3 file is an OS/2 Warp 3 System Data. OS/2 is a series of computer operating systems, initially created by Microsoft and IBM, then later developed by IBM exclusively.
Category: Data files
Application: IBM OS/2 Warp
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
OS3 aliases:
OS3 related links:
OS3 related extensions:
OS/2 Warp Remote Software Update

OS/2 Warp System File

OS/2 Warp Cursor Image

OS/2 Warp Program Manager Information

OS/2 Warp Boot Logo

OS/2 Warp Display Information

OS/2 Warp Filter Device Driver

OS/2 Warp Extended File Attributes Data

OS/2 Warp Device Manager Driver

OS/2 Warp Print Queue Device Driver

Other types of files may also use the .os3 file extension.

🚫 The .os3 file extension is often given incorrectly!

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

is3, ks3, ls3, oc3, oe3, os, osr, osw, ps3, s3, so3

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Altair FEKO POSTFEKO Currents Data
Band-in-a-Box Third-Party Styles
Freescale S-record File
Osu! Replay File
Lumion Project
Motorola S-record Data
Powernet Waveform File
OpenCanvas 3 Event
ScummVM MP3 Sound
OpenCanvas 3 Event Data

🔴 Can't open a .os3 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 cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .os3 file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .os3 file extension, write to us!

Browser: Abbreviation Application Archive Audio Configuration Data Development Disk Image Document Ebook Font Game Data GIS Graphic Malware Multimedia Other Project Scam Unknown Video
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