---
keywords: ["4K DMS", "PDP-8", "PDP-4", 1960s, 1965]
image: ./4kdms.webp
description: "! 4K DMS (Disk Monitor System) was an operating system for the DEC PDP-8 computer. We can run it on the SIMH PDP-8 emulator."
sidebar_position: 2
---

import DocCardList from '@theme/DocCardList';

# ! 4K DMS

![! 4K DMS](./4kdms.webp)

! 4K DMS (Disk Monitor System) was an operating system for the DEC PDP-8 computer. We can run it on the SIMH PDP-8 emulator.

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## Manuals

You can download the ! 4K DMS manuals from here:

- [! 4K DMS Manual](http://www.pdp8online.com/pdp8cgi/query_docs/tifftopdf.pl/pdp8docs/dec-08-odsma-a-d.pdf)
- [! 4K DMS Programmer's Reference Manual](http://www.bitsavers.org/pdf/dec/pdp8/software/DEC-D8-SDAB-D_diskMonPgmRef.pdf)

You may also be interested in the PDP-8 manuals. They were the computers on which ! 4K DMS was supposed to run. You can download them from Bitsavers:

- [PDP-8 Manuals](http://bitsavers.org/pdf/dec/pdp8/)

## Related Pages

- [VirtualHub Screenshots](https://screenshots.virtualhub.eu.org/1960s/1965/4kdms/)
- [Wikipedia](https://en.wikipedia.org/wiki/PDP-8_4K_Disk_Monitor_System)
- [Computer History Wiki PDP-8 page](https://gunkies.org/wiki/PDP-8)

## Credits

- The manuals were taken from [www.pdp8online.com](http://www.pdp8online.com/) and [Bitsavers](http://bitsavers.org).