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blog/2023/03/18-1960s.md

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+---
+title: 1960s Plan
+description: "After a lot of research, I have decided to start from the 1960s instead of the 80s. No Personal/Micro Computer was there in the 60s, hence no personal operating system."
+slug: 1960s
+authors: legacyinstaller
+tags: [plan, 1960s]
+keyword: [1960s, virtualhub]
+image: ./img/1960s.webp
+---
+
+![PDP-7 from 1960s](./img/1960s.webp)
+
+After a lot of research, I have decided to start from the 1960s instead of the 80s. No personal/microcomputer was there in the 60s, hence no personal operating system.<!-- truncate --> There were mainframe operating systems and some minicomputer operating systems.
+
+We will not cover Mainframe operating systems here at VirtualHub. We _will_ cover Mini Computer operating systems. They will be prefixed with a "!" to denote that they are not a personal/microcomputer operating system. There are not many such operating systems. Actually, there are only 3, which I have identified to run on an emulator.
+
+I _will_ cover some mainframe operating systems here in this blog, which I have successfully run on an emulator using instructions elsewhere. Those posts will have screenshots of the operating systems as well as links to the instructions on how to install them.
+
+That's it.
+
+Stay tuned!
+
+<hr/>
+
+Cover Image from [en:User:Toresbe](https://commons.wikimedia.org/wiki/File:Pdp7-oslo-2005.jpeg), [CC SA 1.0](http://creativecommons.org/licenses/sa/1.0/), via Wikimedia Commons

blog/2023/03/18-1965.md

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+---
+title: 1965 Plan
+description: "There were two operating systems of our interest which were released in the year 1965. They are ! DECSys-7 and ! 4K DMS."
+slug: 1965
+authors: legacyinstaller
+tags: [plan, 1960s]
+keyword: [1965, 1960s, virtualhub]
+image: ./img/1965.webp
+date: 2023-03-18T10:00
+---
+
+![DECSys-7 from 1965](./img/1965.webp)
+
+There were two operating systems of our interest which were released in the year 1965. They are ! DECSys-7 and ! 4K DMS.<!-- truncate --> Both of them can be installed on SIMH emulators. ! DECSys-7 can be used on ! PDP-7 emulator and ! 4K DMS on ! PDP-8 emulator.
+
+I will cover them soon.
+
+Stay tuned!

blog/2023/03/18-mainframe-operating-systems-of-1960s.md

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+---
+title: "Mainframe Operating Systems of 1960s"
+description: "In this post, we will see some Mainframe operating systems which were released in the 1960s and can be run on an emulator."
+slug: mainframe-operating-system-of-1960s
+authors: legacyinstaller
+tags: [mainframe, 1960s]
+keyword: [1960s, virtualhub, mainframe]
+image: ./img/leoiii.webp
+date: 2023-03-18T12:00
+---
+
+![Leo III from 1960s](./img/leoiii.webp)
+
+In this post, we will see some Mainframe operating systems which were released in the 1960s and can be run on an emulator.
+
+<!-- truncate -->
+
+## 1960
+
+### IBSys
+
+In the year 1960, an operating system called [IBSys](https://en.wikipedia.org/wiki/IBM_7090/94_IBSYS) was released for the [IBM 7094](https://en.wikipedia.org/wiki/IBM_7090#IBM_7094) mainframe computer. It was a very crude operating system. You can download a kit for running it using the SIMH emulator [here](http://simh.trailing-edge.com/kits/ibsys_kit.zip). The kit is made for Windows only. It needs to be heavily modified to run on Linux. You can download manuals from [bitsavers](http://www.bitsavers.org/pdf/ibm/7090/).
+
+## 1961
+
+### Leo III
+
+[Leo III](<https://en.wikipedia.org/wiki/LEO_(computer)#Applications_and_successors>) was a computer, actually, but the operating system that ran on it had no name. So, we will refer to it as Leo III.
+
+You can download a demo from [here](http://sw-pres.computerconservationsociety.org/Downloads/LeoIIIdemo3.zip). Follow the instructions in the `readme.htm` file inside the archive, and you should be up and running.
+
+## 1966
+
+### DOS/360
+
+[DOS/360](https://en.wikipedia.org/wiki/DOS/360) was an operating system for [IBM System/360](https://en.wikipedia.org/wiki/IBM_System/360), [System/370](https://en.wikipedia.org/wiki/IBM_System/370) and later mainframe computers. Very detailed instructions on how to run it in an emulator are available [here](https://sites.google.com/site/dos360install/).
+
+You can download the manuals from [bitsavers](https://bitsavers.org/pdf/ibm/360/dos/).
+
+### OS/360
+
+[OS/360](https://en.wikipedia.org/wiki/OS/360_and_successors) was also an operating system for [IBM System/360](https://en.wikipedia.org/wiki/IBM_System/360). You can run it using the instructions from [here](http://www.conmicro.com/hercos360/). Manuals are available from [bitsavers](http://www.bitsavers.org/pdf/ibm/360/os/).
+
+## 1967
+
+### MTS
+
+[MTS (Michigan Terminal System)](https://en.wikipedia.org/wiki/Michigan_Terminal_System) was an operating system developed for the [IBM System/360](https://en.wikipedia.org/wiki/IBM_System/360) and compatible mainframes at the University of Michigan. You can run it in an emulator using instructions [here](https://try-mts.com/up-and-running-1-installation/). Manuals are available from [bitsavers](http://www.bitsavers.org/pdf/univOfMichigan/mts/).
+
+### ITS
+
+[ITS (Incompatible Timesharing System)](https://en.wikipedia.org/wiki/Incompatible_Timesharing_System) was an operating system for [PDP-6](https://en.wikipedia.org/wiki/PDP-6) and [PDP-10](https://en.wikipedia.org/wiki/PDP-10) mainframe computers. It can be run on the SIMH emulator by following the instructions [here](https://www.cosmic.com/u/mirian/its/itsbuild.html). You can read more about it on the [Computer History Wiki](https://gunkies.org/wiki/Incompatible_Timesharing_System).
+
+## 1969
+
+### Multics
+
+[Multics (Multiplexed Information and Computing Service)](https://en.wikipedia.org/wiki/Multics) was an influential early time-sharing operating system for the [GE-645](https://en.wikipedia.org/wiki/GE_645) mainframes and the [Honeywell 6180](https://en.wikipedia.org/wiki/Honeywell_6000_series) series machines. It can be run in an emulator using the instructions [here](https://multics-wiki.swenson.org/index.php/Getting_Started). You can download manuals from [bitsavers](http://www.bitsavers.org/pdf/honeywell/large_systems/multics/).
+
+### George 3
+
+[George 3](<https://en.wikipedia.org/wiki/GEORGE_(operating_system)#GEORGE_3_&_4>) was an operating system for the [ICL 1900](https://en.wikipedia.org/wiki/ICT_1900_series) series of mainframes. It can be run in an emulator by following the instructions [here](http://perso.calvaedi.com/~john/George3/Linux.html).
+
+That's it. Of course there are many more Operating Systems which I have not covered, but these are all of them which I was able to find and run in emulators. If you know of more, please let me know in the comment section.
+
+Stay tuned!