--- title: The many derivatives of the CP/M operating system description: The original Intel 8080 version of CP/M appeared in 1974, just seven years before the IBM PC launched with PC DOS. The OS was re-written from a mixture of PL/M... canonical: https://daily.dev/posts/the-many-derivatives-of-the-cp-m-operating-system-9im4wvu0y twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: The many derivatives of the CP/M operating system | daily.dev og:description: The original Intel 8080 version of CP/M appeared in 1974, just seven years before the IBM PC launched with PC DOS. The OS was re-written from a mixture of PL/M... og:url: https://daily.dev/posts/the-many-derivatives-of-the-cp-m-operating-system-9im4wvu0y og:image: https://api.daily.dev/og/posts/9IM4wVU0y.png og:image:alt: The many derivatives of the CP/M operating system og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # The many derivatives of the CP/M operating system **[The Register](https://daily.dev/sources/theregister)** · 7 min read · 3 upvotes · 2 comments ## Summary The original Intel 8080 version of CP/M appeared in 1974, just seven years before the IBM PC launched with PC DOS. The OS was re-written from a mixture of PL/M and assembly language into more modern high-level languages. In 1984, DR renamed the OS to "Concurrent DOS", or CDOS for short. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Community discussion Top comments from developers on daily.dev. **@andypiper** · 0 upvotes > I run CP/M on an RC2014 home built machine. Anyone else have experience with CP/M? I didn’t know this whole fascinating history! ## Similar posts on daily.dev - [Don’t just attend KubeCon \+ CloudNativeCon, Merge Forward your experience\!](https://daily.dev/posts/don-t-just-attend-kubecon-cloudnativecon-merge-forward-your-experience--l0rpp73x8) · CNCF · 1 upvotes · 0 comments - [Announcing H2 2026 KCDs](https://daily.dev/posts/announcing-h2-2026-kcds-m96goajm1) · CNCF · 1 upvotes · 0 comments - [Two months of Open Community Groups](https://daily.dev/posts/two-months-of-open-community-groups-asf52zhbs) · CNCF · 0 upvotes · 0 comments --- Tags: [#microsoft](https://daily.dev/tags/microsoft), [#open-source](https://daily.dev/tags/open-source), [#ibm](https://daily.dev/tags/ibm), [#intel](https://daily.dev/tags/intel), [#gem](https://daily.dev/tags/gem), [#freedos](https://daily.dev/tags/freedos) [View this post on daily.dev](https://daily.dev/posts/the-many-derivatives-of-the-cp-m-operating-system-9im4wvu0y) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"The many derivatives of the CP/M operating system","url":"https://daily.dev/posts/the-many-derivatives-of-the-cp-m-operating-system-9im4wvu0y","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/the-many-derivatives-of-the-cp-m-operating-system-9im4wvu0y"},"datePublished":"2022-08-04T09:35:53.349Z","dateModified":"2022-08-04T09:35:53.344Z","description":"The original Intel 8080 version of CP/M appeared in 1974, just seven years before the IBM PC launched with PC DOS. 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Anyone else have experience with CP/M? I didn’t know this whole fascinating history!","datePublished":"2022-08-04T11:25:30.762Z","dateModified":"2022-08-04T11:25:52.930Z","url":"https://daily.dev/posts/9IM4wVU0y#c-_cznMowBd","author":{"@type":"Person","name":"Andy Piper","url":"https://daily.dev/andypiper","image":"https://avatars1.githubusercontent.com/u/552452?v=4"}}]} ```