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Incompatible Timesharing System

76 mentions on Hacker News by 23 people: 9 stories, 67 comments · first 2017-01-24 · latest 2026-09-12

Mentions per year 76 mentions · busiest year 2023 (19)
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  1. …historical hardware the emulator supports yet, but he's probably worked on some of that too. ;) ) https://github.com/PDP-10/its/issues/620 Thanks to Lars, here are two revisions of an AI Lab memo about LLOGO:…
    comment by DonHopkins · 2026-09-12 · in Logo Programming
  2. …a much less extensive set of foul words and doesn't get insulted like his ANIMAL game does: Doctor: https://github.com/PDP-10/its/blob/master/src/games/doc.102 Guess the Animal: https://github.com/PDP-10/its/blob/master/src/games/animal.1..…
    comment by DonHopkins · 2026-08-25 · in Vintage Artificial Intelligence: Before It Got Awkward
  3. By the way, I also coded a QR symbol generator in PDP-10 assembly language. https://github.com/PDP-10/its/blob/master/src/lars/qrcode.8
    comment by larsbrinkhoff · 2026-05-05 · in Hand Drawn QR Codes (2025)
  4. …preserved, and I converted its typewriter font to Hershey font format. Scroll Saver disassembly: https://github.com/PDP-10/its/blob/f6408e16cb1aaf7f2583c02cd... My kludge to parse it into Hershey JHF format:…
    comment by kragen · 2025-12-02 · in A vector graphics workstation from the 70s
  5. …from the ITS file "AI:HUMOR;AI KOANS". Here's another Moon story from the humor directory: https://github.com/PDP-10/its/blob/master/doc/humor/moon's.g... Moon's I.T.S. CRASH PROCEDURE document from his home directory, which goes into much…
    comment by DonHopkins · 2025-11-20 · in The lost cause of the Lisp machines
  6. …is 'culture' from the MIT frozen in time, from TECO Emacs to Dungeon/Zork and early networking. https://github.com/PDP-10/its On Basic, there's the games example -Basic Computer Games- made into a repo at GitHub, and some people are…
    comment by anthk · 2025-11-09 · in 52 Year old data tape could contain Unix history
  7. ▲ 2
    Early history (1978) of Emacs from PDP-10 ITS archive
    story by signa11 · 2025-10-30 · 1 comment
  8. …passwords. However, Stallman insisted that everyone use the same one, you can still boot it: https://github.com/PDP-10/its
    comment by BSDobelix · 2025-10-27 · in Ken Thompson recalls Unix's rowdy, lock-picking origins
  9. ▲ 2
    Knight TV and keyboard · PDP-10/its Wiki
    story by rbanffy · 2024-12-09 · 0 comments
  10. I built an implementation in PDP-10 assembly language a while back: https://github.com/PDP-10/its/blob/master/src/lars/qrcode.8
    comment by larsbrinkhoff · 2024-11-18 · in Creating a QR Code step by step
  11. …and hooking, a Maclisp close to the future GNU Emacs' Elisp, proto-internet, AI, video terminals... https://github.com/PDP-10/its/blob/master/README.md http://www.hakmem.org/ These have been built collaboratively, for sure. GNU and Emacs…
    comment by anthk · 2024-09-28 · in Ask HN: Why does current interest in retro computing focus on the early 80s?
  12. …https://news.ycombinator.com/item?id=37723853 [4] https://news.ycombinator.com/item?id=37780515 [5] https://github.com/PDP-10/its/blob/master/src/sysnet/supdup....
    comment by DonHopkins · 2024-07-24 · in The Origin of Emacs in 1976
  13. …from user to user to share like a joint, by detatching and reattaching them to different TTYs! https://github.com/PDP-10/its/blob/master/doc/_info_/its.pri... >VIII.B. CRTSTY >For display terminals which are not handled directly by the…
    comment by DonHopkins · 2024-07-24 · in The Origin of Emacs in 1976
  14. Compile ITS and just run :macsyma at the DDT prompt (shell/debugger) from ITS: https://github.com/pdp-10/its The syntax it's the same, I even made a plot and 'printed' into the host from an ARDS output from the plot command, by converting…
    comment by anthk · 2024-04-15 · in Integral Calculator
  15. >MIT AI... Not all, ITS and PDP10 can be emulated under Simh classic. Or you clone their github repo https://github.com/PDP-10/its and run make download EMULATOR=pdp10-ka Macsyma, Lisp, Emacs, Adventure... are still alive. And maybe tons…
    comment by anthk · 2024-04-05 · in Escaping the Digital Dark Age
  16. ▲ 2
    The Magic Switch – Modern Update
    story by bonyt · 2024-04-03 · 0 comments
  17. …for DOCTOR from ITS -- it has a much less extensive set of foul words and doesn't get insulted: https://github.com/PDP-10/its/blob/master/src/games/doc.102 I wrote this recently about Kent Pitman's work on Lisp, the MIT-AI Lab's ITS…
    comment by DonHopkins · 2024-02-17 · in Kent Pitman's Lisp Eliza from MIT-AI's ITS History Project
  18. Kent Pitman also wrote the ANIMAL guessing game in spring of 1978: https://github.com/PDP-10/its/blob/master/src/games/animal.1... https://github.com/PDP-10/its/blob/master/src/games/animal.r... It would guess your animal by asking you yes…
    comment by DonHopkins · 2024-02-17 · in Kent Pitman's Lisp Eliza from MIT-AI's ITS History Project
  19. …in MACLISP, which was of course inspired by ELIZA. (Joseph Weizenbaum taught Kent Pitman LISP!) https://github.com/PDP-10/its/blob/master/src/games/doc.102 And here's what happened with he (manually by typing) hooked it up with Kenneth…
    comment by DonHopkins · 2024-01-07 · in AI or Ain't: Eliza
  20. …with Interlan Ethernet board, and the ROM would download the remaining OS code over network. https://github.com/PDP-10/its/tree/master/src/mits_s
    comment by p_l · 2023-12-26 · in War of the workstations: How the lowest bidders shaped today's tech landscape
  21. An older chess TUI: https://github.com/PDP-10/its/issues/1024#issuecomment-40025...
    comment by larsbrinkhoff · 2023-12-06 · in A chess TUI implementation
  22. …in MACLISP, which was of course inspired by ELIZA. (Joseph Weizenbaum taught Kent Pitman LISP!) https://github.com/PDP-10/its/blob/master/src/games/doc.102 And here's what happened with he (manually by typing) hooked it up with Kenneth…
    comment by DonHopkins · 2023-11-24 · in The Revival of Medley/Interlisp
  23. …it depended on its users at MIT and elsewhere, and its specific time and place in history. [1] https://github.com/PDP-10/its
    comment by musicale · 2023-11-10 · in Play the first ever text adventure game in your Linux terminal
  24. …to program in MACLISP. (That's "Man And Computer Lisp" from "Project MAC", not "Macintosh Lisp".) https://github.com/PDP-10/its/tree/master/src/teach https://en.wikipedia.org/wiki/Incompatible_Timesharing_Syste...…
    comment by DonHopkins · 2023-10-29 · in (learn 'scheme)
  25. …and of course there's PDP-10 org and its gather docs on github: https://github.com/PDP-10/its
    comment by p_l · 2023-10-29 · in Research Unix Sixth Edition (WASM)
  26. …https://news.ycombinator.com/item?id=37723853 [4] https://news.ycombinator.com/item?id=37780515 [5] https://github.com/PDP-10/its/blob/master/src/sysnet/supdup.... subttl LSRCHK and LSRWRN -- see if user is loser ;;; This checks to see if…
    comment by DonHopkins · 2023-10-22 · in "<ESC>[31M"? ANSI Terminal security in 2023 and finding 10 CVEs
  27. …and forced to use a shitty VT52). http://junk.nocrew.org/pipermail/its/1988-September/002005.h... https://github.com/PDP-10/its/blob/master/doc/sysdoc/itstty.... >This file describes just about all there is to know about using and…
    comment by DonHopkins · 2023-10-22 · in "<ESC>[31M"? ANSI Terminal security in 2023 and finding 10 CVEs
  28. …wholeheartedly, based on both practical projects and the retrocomputing world. For example: https://github.com/PDP-10/its/ This is a repo for the Incompatible Timesharing System operating system, ITS to its friends. ITS ran on 36-bit…
    comment by msla · 2023-10-10 · in Firefox tooltip bug fixed after 22 years
  29. …that ChatGPT probably read: LIST OF TECO COMMANDS, TECO VERSION 1132. Last updated 5 August 1981: https://github.com/PDP-10/its/blob/master/doc/_teco_/tecord.... TECO PRIMER: AN ANNOTATED OUTLINE OF TECO COMMANDS:…
    comment by DonHopkins · 2023-07-30 · in The Hacker's Dictionary
  30. …the original jargon file from AI:HUMOR; free of ESR's pollution: AI:HUMOR;MITSAI JARGON (25.3 KB): https://github.com/PDP-10/its/blob/master/doc/humor/mitsai.j... AI:HUMOR;JARGON > (85.3 KB): https://github.com/PDP-10/its/blob/master/doc/hu…
    comment by DonHopkins · 2023-07-29 · in The Hacker's Dictionary
  31. …historical hardware the emulator supports yet, but he's probably worked on some of that too. ;) ) https://github.com/PDP-10/its/issues/620 Thanks to Lars, here are two revisions of an AI Lab memo about LLOGO:…
    comment by DonHopkins · 2023-07-17 · in LOGO Manual (1974) [pdf]
  32. …https://archive.org/details/what-about-tomorrow-on-the-side-... See this for some more information: https://github.com/PDP-10/its/issues/425#issuecomment-145588...
    comment by larsbrinkhoff · 2023-07-10 · in PDP-10 Incompatible Timesharing System emulator
  33. …recording of it [2], and it's quite impressive too. [1] https://en.wikipedia.org/wiki/SHRDLU [2] https://github.com/PDP-10/its/issues/147
    comment by gattilorenz · 2023-07-10 · in PDP-10 Incompatible Timesharing System emulator
  34. ▲ 78
    PDP-10 Incompatible Timesharing System emulator
    story by gattilorenz · 2023-07-09 · 45 comments
  35. …more powerful and elegant, unleashing the full undiluted power of the PDP-10 at your fingertips. https://github.com/PDP-10/its/blob/master/doc/_info_/ddtord.... You could also write DDT commands in text files like your login file, i.e.…
    comment by DonHopkins · 2023-05-18 · in The Case for Bash (2021)
  36. This has very strong vibes of the PDP-10's Magic Switch https://github.com/PDP-10/its/issues/1232
    comment by ciroduran · 2023-04-28 · in Check if your IKEA chair is compatible with your screen
  37. Oops, URL should be https://github.com/PDP-10/its/pull/2150
    comment by larsbrinkhoff · 2023-02-23 · in Original PDP-10 Zork now rebuilt with MDL compiler
  38. ▲ 1
    Original PDP-10 Zork now rebuilt with MDL compiler
    story by larsbrinkhoff · 2023-02-23 · 2 comments
  39. …environments. ITS EMACS had some kind of hsplit support early on, possibly as early as April 1978 ( https://github.com/PDP-10/its/blob/master/doc/eak/emacs.lore ), and later some limited terminal-dependent vsplit support was developed for…
    comment by PAPPPmAc · 2022-11-27 · in What's a good Linux terminal emulator that doesn't try to reinvent TMUX?
  40. IDK on the PDP-8, but PDP-10 had ITS. https://github.com/PDP-10/its
    comment by anthk · 2022-11-21 · in Ask HN: What story from the PDP-8 era would make a good script?
  41. ▲ 2
    PDP10/Its: Incompatible Timesharing System
    story by gattilorenz · 2022-08-04 · 0 comments
  42. …Incompatible Timesharing System (github.com) https://news.ycombinator.com/item?id=13514918 https://github.com/PDP-10/its
    comment by DonHopkins · 2022-06-20 · in Orkut
  43. Some (relatively successful) attempts were made to run it in an emulated PDP: https://github.com/PDP-10/its/issues/147
    comment by gattilorenz · 2022-06-19 · in SHRDLU
  44. > ITS is also available as open source ( https://github.com/PDP-10/its ) Sometimes I wonder, if you wanted to create an operating system like ITS for more modern platforms, what it would look like? ITS is written in PDP-10 assembly, what…
    comment by skissane · 2022-05-18 · in The Unix-Haters Handbook (1994) [pdf]
  45. …many open-source Scheme and Common Lisp implementations, and ITS is also available as open source ( https://github.com/PDP-10/its ). Of course, modern Unix-like systems these days are large and complex, though Plan 9 and Inferno are quite…
    comment by linguae · 2022-05-18 · in The Unix-Haters Handbook (1994) [pdf]
  46. …historical hardware the emulator supports yet, but he's probably worked on some of that too. ;) ) https://github.com/PDP-10/its/issues/620 Thanks to Lars, here are two revisions of an AI Lab memo about LLOGO:…
    comment by DonHopkins · 2021-09-21 · in Byte Magazine Volume 07 Number 08 – Logo (1982)
  47. …The opposite to Multics the "Incompatible Timesharing System" gets some Maintenance-(love) too: https://github.com/PDP-10/its
    comment by nix23 · 2021-07-30 · in Multics MR12.7 released
  48. …in MACLISP, which was of course inspired by ELIZA. (Joseph Weizenbaum taught Kent Pitman LISP!) https://github.com/PDP-10/its/blob/master/src/games/doc.102 And here's what happened with he (manually by typing) hooked it up with Kenneth…
    comment by DonHopkins · 2021-05-30 · in Joseph Weizenbaum’s Original ELIZA
  49. …have more cool stuff. [1] https://multicians.org/site-timeline.html Btw, great fan of your work at https://github.com/PDP-10/its . Keep up the good work in keeping computer history alive!
    comment by bilegeek · 2021-05-12 · in Multics Public Access
  50. In that case you should probably try ITS. http://github.com/PDP-10/its
    comment by larsbrinkhoff · 2021-04-20 · in PiDP-11 – Recreating PDP-11/70 with Raspberry Pi