What is MIME type "application/vnd.fujitsu.oasys"?

A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.

The MIME type application/vnd.fujitsu.oasys designates files created by the Fujitsu OASYS system. It tells software that the file holds data with a unique layout and formatting specific to Fujitsu’s ecosystem.
Files with the OAS extension use this MIME type.

Main use case: To open and edit documents within Fujitsu’s proprietary word processing or document management suite.
Functionality: It preserves rich text formatting, images, and structured layout instructions.
Additional uses: Document archiving, printing workflows, and secure file exchange in environments that favor Fujitsu solutions.

This MIME type helps operating systems and web servers identify the correct application for handling these files.
For further details, see the IANA record on this MIME type.

Associated file extensions

.oas

Usage Examples

HTTP Header

When serving content with this MIME type, set the Content-Type header:


    Content-Type: application/vnd.fujitsu.oasys

HTML

In HTML, you can specify the MIME type in various elements:


    <a href="file.dat" type="application/vnd.fujitsu.oasys">Download file</a>

Server-side (Node.js)

Setting the Content-Type header in Node.js:


    const http = require('http');
    
    http.createServer((req, res) => {
      res.setHeader('Content-Type', 'application/vnd.fujitsu.oasys');
      res.end('Content here');
    }).listen(3000);

Associated file extensions

.oas

FAQ

What is a MIME type?

A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.

MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.

MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.

How do I find the MIME type for a file?

You can check the file extension or use a file identification tool such as file --mime-type on the command line. Many programming languages also provide libraries to detect MIME types.

Why are multiple MIME types listed for one extension?

Different applications and historical conventions may use alternative MIME identifiers for the same kind of file. Showing them all helps ensure compatibility across systems.