---
title: "Open Sourcing DOS 4"
url: https://daily.dev/posts/open-sourcing-dos-4-x6se4tqrs
source_url: http://feeds.hanselman.com/~/882544025/0/scotthanselman~Open-Sourcing-DOS
type: article
source: "Scott Hanselman"
published: 2024-04-25T21:09:29.718Z
updated: 2024-05-09T09:27:15.675Z
tags: ["open-source"]
reading_time: 2
upvotes: 1
comments: 0
language: en
---

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# Open Sourcing DOS 4

**[Scott Hanselman](https://daily.dev/sources/hanselman)** · 2 min read · 1 upvotes · 0 comments

## Summary

Microsoft, in partnership with IBM, has released the source code to MS-DOS 4.00 after ten years. It holds an important place in history as an operating system written entirely in 8086 assembly code. The release includes unreleased beta binaries and documentation, providing fascinating insights into the history of DOS.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <http://feeds.hanselman.com/~/882544025/0/scotthanselman~Open-Sourcing-DOS>

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---

Tags: [#open-source](https://daily.dev/tags/open-source)

[View this post on daily.dev](https://daily.dev/posts/open-sourcing-dos-4-x6se4tqrs)