Operating System

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operating system (os) : software that controls the operation of a computer and directs the processing of programs (as by assigning storage space in memory and controlling input and output functions) — Webster   See also OneLook

Operating System (FOLDOC: Free Online Dictionary of Computing)


Operating system (OS) is a set of software that manages computer hardware resources and provides common services for computer programs. The operating system is a vital component of the system software in a computer system. Application programs require an operating system to function. — Wikipedia

File system is a method and data structure that the operating system uses to control how data is stored and retrieved. Without a file system, data placed in a storage medium would be one large body of data with no way to tell where one piece of data stopped and the next began, or where any piece of data was located when it was time to retrieve it. By separating the data into pieces and giving each piece a name, the data is easily isolated and identified. Taking its name from the way a paper-based data management system is named, each group of data is called a “file.” The structure and logic rules used to manage the groups of data and their names is called a “file system.” — Wikipedia




Old school: I work in DOS for an entire day (Sean Gallagher, Ars Technica)

Running Windows 95 in an “app” is a dumb stunt that makes a good point (Ars Staff, Ars Technica)
You know you love Windows 95, and now it’s an app (Johnny Lieu, Mashable)

History of Operating Systems (OS Data)
A Brief History of Computer Operating Systems (Jonathan R. Senning, Gordon College)
History of Operating Systems (Wikipedia)


Library of Congress # QA76.76.O63 Operating System (UPenn Online Books)

WorldCat, Library of Congress, UPenn Online Books, Open Library




MERLOT: Multimedia Educational Resource for Learning and Online Teaching
OER Commons: Open Educational Resources


Crash Course: Computer Science (YouTube Channel)

CS 322: Operating Systems and Computer Architecture (Jonathan R. Senning, Gordon College)



SIGOPS – Special Interest Group on Operating Systems (ACM)


OS News
NPR Archives











OSnews Exploring the Future of Computing

  • The nightmare of getting DOOM running on PowerPC...
    by Thom Holwerda on May 21, 2022 at 11:57 pm

    Can’t get enough of porting old software? How about getting Doom ported to and running on an old version of AIX for PowerPC? You know what ever computer needs? DOOM. Do you know what I couldn’t find? DOOM for the IBM RS/6000, but that’s not surprising. These machines were never meant for gaming, but that’s doesn’t mean you can’t do it. If you like pain anyway. In this extra long NCommander special, we’re going to explore AIX, discuss the RS/6000 Model 150 43p I’m running it on. […]

  • Lotus 1-2-3 ported to Linux
    by Thom Holwerda on May 21, 2022 at 11:54 pm

    I’ll cut to the chase; through a combination of unlikely discoveries, crazy hacks and the 90s BBS warez scene I’ve been able to port Lotus 1-2-3 natively to Linux – an operating system that literally didn’t exist when 1-2-3 was released! If you want to hear how a proprietary application could be ported to new operating systems 30 years after release, read on! This isn’t running through an emulator or a VM – this is a real port. Amazing work.

  • Windows XP Delta Edition
    by Thom Holwerda on May 21, 2022 at 5:28 pm

    Windows XP Delta Edition is a modification of Windows XP which aims to recreate the Windows XP Beta 2 aesthetic and bring back lost features, functions, and programs from previous versions of Windows, along with prerelease versions of Windows XP. I like these community releases for Windows XP. While I never really liked XP when it was current, and while you really shouldn’t be using XP in any serious capacity today, it can be a ton of fun to try and see how far you can get in the modern world […]

  • Raptor CS: fully owner-controlled computing using...
    by Thom Holwerda on May 21, 2022 at 12:26 am

    Peter Czanik did an interview with Timothy Pearson of Raptor Engineering, the company behind POWER9 systems like the Talos II and Blackbird, which I reviewed last year. There’s some good stuff in there, most importantly the reasoning as to why there isn’t any POWER10 hardware from Raptor yet. At this time we do not have plans to create a POWER10 system. The reasoning behind this is that somehow, during the COVID19 shutdowns and subsequent Global Foundries issues, IBM ended up placing two […]

  • Apple promoting accessibility features for iOS...
    by Thom Holwerda on May 20, 2022 at 11:29 pm

    Apple this week celebrated Global Accessibility Awareness Day by announcing new accessibility features that will be available later this year with iOS 16 and other software updates. However, while we wait for those updates, the company has been promoting accessibility tips that anyone can take advantage of. One of the new accessibility features teased by Apple this week is called “Door Detection,” and it uses the LiDAR scanner on supported iPhone and iPad models to help users understand […]




Here are links to pages about closely related subjects.


Function Communications Computation Storage Creation Simulation
Analog Mail Device Paper Type, Print Automaton
Electronic Network Calculator Tape Record Elektro
Digital Internet Computer
Hardware Modem Microprocessor Memory Peripheral Robot, XR
Software Service (Web) Program (OS, SS) Database Application AI, VW

Format Multimedia (Video, Animation) Image (Object) Scent, Flavor, Audio (Text) Haptic, “Other



1.   The resources on this page are are organized by a classification scheme developed exclusively for Cosma.