virtualhub.eu.org/blog/2023/12/03-1973.md
2024-01-25 16:46:09 +05:30

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---
title: 1973 Plan
description: "There were two operating system of our interest which was released in the year 1973. Sadly, we do not have a complete copy of ! Unix v4."
slug: 1973
authors: legacyinstaller
tags: [plan, 1970s]
image: ./img/1973.webp
keyword: [1973, 1970s, virtualhub]
---
![Alto OS from 1973](./img/1973.webp)
There were two operating system of our interest which were released in the year 1973. They were:
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- Alto OS
- ! Unix v4
Alto OS can be used on the [ContrAlto](https://github.com/livingcomputermuseum/ContrAlto) emulator.
Sadly, we do not have a complete copy of Unix v4, but we do have a copy of a [kernel](<https://en.wikipedia.org/wiki/Kernel_(operating_system)>) that is from between v3 and v4. We can use that kernel with v5 [userland](https://en.wikipedia.org/wiki/User_space). It can be used on SIMH PDP-11 emulator.
I will cover them soon.
Stay tuned!