---
keywords: ["OS/8", "PDP-8", 1970s, 1971]
image: ./os8.webp
description: "! OS/8 was the most famous operating system for the DEC PDP-8 computer. We can run it on SIMH emulator."
sidebar_position: 2
---

import DocCardList from '@theme/DocCardList';

# ! OS/8

![! OS/8](./os8.webp)

! OS/8 was the most famous operating system for the DEC PDP-8 computer. We can run it on SIMH emulator.

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## Manuals

You can download the ! OS/8 manuals from here:

- [! OS/8 Handbook](http://bitsavers.org/pdf/dec/pdp8/os8/OS8_Handbook_Apr1974.pdf)
- [! OS/8 Handbook Update](http://bitsavers.org/pdf/dec/pdp8/os8/DEC-S8-OSHBA-A_DN4_OS8_Handbook_Update_Sep77.pdf)
- [! OS/8 System Reference Manual](http://bitsavers.org/pdf/dec/pdp8/os8/AA-H607A-TA_OS8_V3D_sysMan.pdf)
- [! OS/8 Language Reference Manual](http://bitsavers.org/pdf/dec/pdp8/os8/AA-H609A-TA_OS8_Language_Reference_Manual_Mar79.pdf)
- [! OS/8 TECO Reference Manual](http://bitsavers.org/pdf/dec/pdp8/os8/AA-H608A-TA_os8teco_mar79.pdf)
- [! OS/8 Software Support Manual](http://bitsavers.org/pdf/dec/pdp8/os8/DEC-S8-OSSMB-A-D_OS8_v3ssup.pdf)
- [! OS/8 System Generation Notes](http://bitsavers.org/pdf/dec/pdp8/os8/AA-H606A-TA_os8SysgenNotes.pdf)
- [! OS/8 Device Extensions User's Guide](http://bitsavers.org/pdf/dec/pdp8/os8/AA-D319A-TA_os8DevExt.pdf)
- [! OS/8 Error Messages](http://bitsavers.org/pdf/dec/pdp8/os8/AA-H610A-TA_os8errMsg_mar79.pdf)
- [FORTRAN IV Software Support Manual](http://bitsavers.org/pdf/dec/pdp8/os8/DEC-S8-LFSSA-A-D_F4swSupp.pdf)

You may also be interested in the PDP-8 manuals. They were the computers on which ! OS/8 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/1970s/1971/os8/)
- [Wikipedia](https://en.wikipedia.org/wiki/OS/8)
- [Computer History Wiki ! OS/8 page](https://gunkies.org/wiki/OS/8)
- [Computer History Wiki PDP-8 page](https://gunkies.org/wiki/PDP-8)
- [pdp8online OS/8 page](https://www.pdp8online.com/os/os8/)

## Credits

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