Multics 1115 pages
25 Oct 2020

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Home Page. Multics site home page 27K 10/07/20
Multics History. Narrative history of Multics. 113K 08/10/20
Features. Features of Multics 83K 08/10/20
DPS 8M Instruction Set. Meaning of instruction set mnemonics 46K 08/10/20
6180 opcodes - normal. Operation Code Map (bit 27 = 0) 3K 08/10/20
6180 opcodes - EIS. Operation Code Map (bit 27 = 1) 2K 08/10/20
AL39 Multics Processor Manual. 1.5MB PDF 1505K 08/10/20
Myths. Incorrect statements about Multics found on the web. 72K 08/10/20
Project MAC. History of MIT Project MAC. 82K 10/24/20
Dates. List of Multics related events in time order. 69K 10/11/20
Glossary Index. Dictionary of Multics terms, concepts, and jargon. 95K 09/20/20
Glossary - A 99K 09/20/20
Glossary - B 45K 09/20/20
Glossary - C 81K 09/20/20
Glossary - D 61K 09/20/20
Glossary - E 46K 09/20/20
Glossary - F 42K 09/20/20
Glossary - G 25K 09/20/20
Glossary - H 25K 09/20/20
Glossary - I 52K 09/20/20
Glossary - J 16K 09/20/20
Glossary - K 21K 09/20/20
Glossary - L 42K 09/20/20
Glossary - M 78K 09/20/20
Glossary - N 28K 09/20/20
Glossary - O 22K 09/20/20
Glossary - P 87K 09/20/20
Glossary - Q 21K 09/20/20
Glossary - R 54K 09/20/20
Glossary - S 81K 09/20/20
Glossary - T 53K 09/20/20
Glossary - U 31K 09/20/20
Glossary - V 29K 09/20/20
Glossary - W 20K 09/20/20
Glossary - X 18K 09/20/20
Glossary - Y 14K 09/20/20
Glossary - Z 18K 09/20/20
The Multics History Project. Project to preserve historical artifacts about the Multics operating system. 18K 08/10/20
History Project Wish List. Material we'd like to find for the Multics History Project. 17K 08/10/20
Letter From Corby. On the occasion of the shutdown of the last Multics system. 13K 08/10/20
Multicians. List of contributors to Multics. 593K 10/23/20
Multicians Registration. Signup form 19K 08/10/20 Information on mail addresses in the domain. 22K 08/10/20
Stories. Anecdotes and war stories about Multics. 66K 08/10/20
Pictures of the MIT 6180. Publicity pictures from 1973 15K 08/10/20
GE-645 Circuit Board. Actual board from the BTL GE-645. 14K 08/10/20
It Can Be Done. Writing bug-free software. 15K 08/10/20
Shangri-La and the Paris 645. The 1970 "merger" and an early software factory. 17K 08/10/20
ST. JOHN'S HOSTS MULTICS. Honeywell internal newsletter from 1981. 8K 08/10/20
Origin of the Cookie Monster. A legendary Multics hack. 16K 08/10/20
Corby. Homage to our leader, Fernando J. Corbató 38K 08/10/20
Memorial Gathering for Corby. MIT, November 4, 2019 47K 08/10/20
Memorial Gathering for Corby. Program, November 4, 2019 389K corby-memorial.pdf not found
The Spirit of Multics. Remark by Don Wagner. 12K 08/10/20
Installing the GE-645 in Paris. Story by Dave Vinograd. 17K 08/10/20
Teaching Multics in Tokyo. Story by Dave Vinograd. 19K 08/10/20
The Developer's Wail. Story by Dave Vinograd. 13K 08/10/20
MacLisp at ENWGS. Story by Robert Matern. 15K 08/10/20
Multics Humor at ENWGS. Jokes about ENWGS 18K 08/10/20
Organick's Book. How to order Organick's book from MIT Press 18K 08/10/20
Operational Statistics, 1969. Charts from the early days of Multics service at MIT. 14K 08/10/20
Honeywell Management. Inside story of Honeywell politics. 23K 08/10/20
Hodie Natus Est Radici Frater. A 1976 error message in Latin. 23K 08/10/20
How Many Users?. CTSS load and Multics performance in the 1960s. 17K 08/10/20
Summer 1977: I was a Multics Intern. Dream summer vacation in .. Phoenix. 8K 08/10/20
Project MAC 25th Anniversary. 1988 Project MAC reunion at MIT. 20K 08/10/20
Project MAC 35th Anniversary. 1999 Project MAC reunion 30K 08/10/20
CISL Farewell. Group photo of the CISL group taken in 1985. 15K 08/10/20
USGS-M Recollections. Using Multics in Menlo Park. 19K 08/10/20
Alan Sawyer's Multics Bio. Bell Canada applications conversion. 19K 08/10/20
Julie Jackson's Multics Bio. What Julie worked on. 21K 08/10/20
"You Had To Go To Radio Shack?". Demonstrating the Cray Station to Ford. 20K 08/10/20
Lee Scheffler's Multics Bio. What Lee worked on at Project MAC. 15K 08/10/20
Marketing Multics in the Midwest. Selling Multics in Iowa in a snowstorm. 15K 08/10/20
Short Operator. The true short operator story. 14K 08/10/20
The Magic Finger. Helping the University of Calgary tune its Multics. 16K 08/10/20
Low Bottle Pressure. Famous drum crashes in the 1960s. 21K 08/10/20
The 645 Chip. 1984 plan to put a 645 on a chip. 13K 08/10/20
Message Coordinator. Lessons from early development. 17K 08/10/20
Cryptic Messages from Antiquity. PL/I error messages remembered. 16K 08/10/20
Multics SNOBOL. Multics SNOBOL and the Missing END Statement. 16K 08/10/20
Multo ante natus eram. A date-related crash in 1995. 17K 08/10/20
INRIA Machine Room. The machine room at INRIA, Rocquencourt, France, in October 1991. 13K 08/10/20
Visiting Project MAC. Photo from Oda-san's 1973 visit to Cambridge. 12K 08/13/20
The Palyn Report. Marketing politics. 24K 08/10/20
Phase One. The first words of Multics. 22K 08/10/20
Picnics. Good times in the summer. 40K 08/10/20
An Obfuscated PL/I Program. Try to guess what this PL/I program does. 14K 08/10/20
Multics REDUCE. Symbolic algebra and particle physics by Rainer Schöpf. 16K 08/10/20
Multics Reunion and Dinner, June 2004. Events honoring Corby on 19 June 2004. 26K 08/10/20
2004 Multics Reunion Attendance 6K 08/10/20
Corbató Fellowship. Graduate Fellowship honoring Corby. 13K 08/10/20
2012 Multics Reunion . Informal gathering of Multicians in June 2012 18K 08/10/20
645 System: Artist's Conception. A painting of the future GE-645. 14K 08/10/20
Visiting CISL. Training the flying squad. 17K 08/10/20
Snow Joke. A message in the snow. 13K 08/10/20
Marketing Item. Teaching salesmen to consider Multics. 13K 08/10/20
Industrial Nucleonics and DCC. 1970s marketing successes. 14K 08/10/20
Marketing Successes. 1970s newsletter articles. 15K 08/10/20
Publicity Photos. More 1970s news articles. 14K 08/10/20
Honeywell User News. The first Multics sale in Europe and more. 13K 08/10/20
Installing USL. Crayfish and hurricanes. 14K 08/10/20
Flower. A never shipped Multics CPU. 17K 08/10/20
Using Ring 5. Protecting a source control database. 14K 08/10/20
Security. How the Air Force broke Multics security. 26K 10/09/20
The Origin of the Shell. RUNCOM and its progeny. 17K 08/10/20
Tech Square. Where we worked 29K 08/10/20
Telefunken TR440. Interesting German machine. 14K 08/10/20
Timing Channels. Covert channels and the star property. 19K 08/10/20
The Louisiana State Trooper Story. Another marketing legend. 16K 08/10/20
THVV Multics Bio. What Tom worked on. 27K 08/10/20
Unix and Multics. Our famous child. 26K 08/10/20
Benchmarks. Stories of benchmark tests done to sell Multics. 41K 08/10/20
The FJCC Papers. How the FJCC papers were written. 18K 08/10/20
The User Ring Newsletter. Newsletter for HLSUA Multics users, June 1986. 14K 08/10/20
Ring Zero and the Null Pointers. CNO Multicians who played rock and roll. 13K 08/10/20
Early days of Multics and Performance. Early days of Multics and rusty analysis on Performance Improvement. 24K 08/10/20
Project MAC 50th Anniversary. 2014 Project MAC and Multics reunion 36K 08/10/20
Project MAC Recollections. One graduate student's recollections. 26K 08/10/20
Multics Panel at ACSAC 30. Multics security Panel, December 2014 23K 08/10/20
Honeywell Brain Damage. SIPB response to iox_ 17K 08/10/20
The foobar bug. A GE-645 DoS hardware bug that was never fixed. 23K 08/10/20
Tapes for Phoenix. The GIOC bug that was never fixed. 30K 08/10/20
My Introduction to Multics. How I got started with Multics. 14K 08/10/20
NWGS Stories. Stories from the development of the NWGS code at Moorestown NJ. 24K 08/10/20
ASEA Stories. Personal stories from working at ASEA in Sweden. 15K 08/10/20
The CISL Wake. 28 photos from the CISL Wake held in May 1986. 20K 08/10/20
Paul Green Multics Collection. Multics PL/I demo programs by several authors, and writings by Paul Green. 15K 08/10/20
Barry Wolman Multics Collection. Multics PL/I demo programs by Barry Wolman. 15K 08/10/20
John Potts Multics Bio. Working at Bell Canada and DND-H. 13K 08/10/20
Multics in Phoenix. Development and support in Phoenix. 96K 10/01/20
Pictures of Multicians. Galleries of people. 61K 08/10/20
Humor. Jokes about Multics. 36K 08/10/20
Memorabilia. Trinkets, T-shirts, and Ties. 32K 08/10/20
Bibliography. Papers, books, memos, and manuals related to Multics 469K 10/23/20
Papers Online. Classic papers about Multics available on the Web. 31K 10/09/20
Introduction and Overview of the Multics System. Classic 1965 paper introducing Multics 59K 08/10/20
System Design of a Computer for Time Sharing Applications. Classic 1965 paper introducing Multics 30K 08/10/20
Structure of the Multics Supervisor. Classic 1965 paper introducing Multics supervisor design 49K 08/10/20
A General-Purpose File System For Secondary Storage. Classic 1965 paper introducing Multics file system 72K 08/10/20
Communications and Input/Output Switching in a Multiplex Computing System. Classic 1965 paper introducing Multics I/O system 44K 08/10/20
Some Thoughts About the Social Implications of Accessible Computing. Classic 1965 paper introducing Multics 24K 09/15/20
A brief description of privacy measures in the Multics operating system. Security in the Multics operating system. AFIPS SJCC, 1967 9K 08/10/20
Protection in an information processing utility. 1968 description of Multics protection mechanism. 434K 08/10/20
Virtual memory, processes, and sharing in Multics. 1968 paper on processes, linkage, stack, call 39K 08/10/20
Sensitive issues in the design of multi-use systems. 1968 paper on OS design 272K 08/10/20
Some Considerations of Supervisor Program Design for Multiplexed Computer Systems. 1968 paper on OS design 71K 08/10/20
A Paging Experiment with the Multics System. 1969 paper on paging 284K 08/10/20
The Multics Virtual Memory: Concepts and Design. 1969 paper on virtual memory 63K 08/10/20
The Role of Motherhood in the Pop Art of System Programming. 1969 paper on system programming 29K 08/10/20
The Multics PL/1 Compiler. 1969 paper on PL/I compiler implementation 54K 08/10/20
Program naming problems in a shared tree-structured hierarchy. 1969 paper on search rules. 233K 08/10/20
The Instrumentation of Multics. 1969 paper on Multics instrumentation 38K 08/10/20
Remote Terminal Character Stream Processing in Multics. 1970 paper on termimal I/O 93K 08/10/20
Technical and Human Engineering Problems in Connecting Terminals to a Time-Sharing System. 1970 paper on terminal I/O 829K 08/10/20
Some Observations about Decentralization of File Systems. 1971 paper on file system design 40K 08/10/20
A Hardware Architecture for Implementing Protection Rings. 1971 paper on rings 75K 08/10/20
The Multics Input/Output System. 1971 paper on I/O system 46K 08/10/20
Multics--The first seven years. 1972 78K 08/10/20
A simple linear model of demand paging performance. 1972 paper on working sets 338K 08/10/20
MOO in Multics. 1972 paper on games in Multics 53K 08/10/20
Protection and the Control of Information Sharing in Multics. 1974 paper on security 485K 08/10/20
Ongoing Research and Development in Information Protection. 1974 paper on security 620K 08/10/20
Automated Merging of Software Modifications. 1977 paper on merge_ascii 30K 08/10/20
A Managerial View of the Multics System Development. 1977 paper on Multics project experience 57K 09/15/20
The Multics MACLISP Compiler: The Basic Hackery -- a Tutorial. 1977 paper on LISP compiler 142K 08/10/20
footnotes for The Multics MACLISP Compiler: The Basic Hackery. Footnotes 18K 08/10/20
The Multics System Programming Process. 1978 paper on Multics process 23K 08/10/20
Multics Emacs: The History, Design and Implementation. 1979 Mother of All Emacs Papers 155K 08/10/20
Experiences With an Interactive Electronic Meeting Facility. 1983 paper on forum 27K 08/10/20
Multics Through the Looking Glass. 1980 HLSUA paper on tuning Calgary 66K 08/10/20
footnotes for Multics Through the Looking Glass. Footnotes 4K 08/10/20
Implementing Forth for the Multics operating system. paper at the 1985 Rochester Forth Conference 1971K 08/10/20
The Multics Device Utility Package. BTL Repository doc B0100 97K 08/10/20
Project MAC Progress Report X. 1972-1973 6672K 08/10/20
Articles. Technical articles about Multics. 18K 08/10/20
Multics Data Security. Security controls in Multics. Published in Scientific Honeyweller (Vol. 2 No. 2) and as Honeywell doc GA01. 50K 08/10/20
Observations about Software Maintenance. A talk to the Ada SIG by Paul Stachour about the Multics Way. 35K 08/11/20
Multics History. PDF slides from John Gintell's lecture on Multics History to the ACM Greater Boston Chapter. Also available on YouTube. 94K 08/10/20
Multics Virtual Memory - Tutorial and Reflections. Summary of the Multics virtual memory design. 67K 08/10/20
The New Storage System. 1975 project to replace the file storage system. 32K 08/10/20
Printer Software. Printers, listings, and crash dumps. 28K 08/10/20
Home Terminals. Forty years of logging in from home. 32K 09/12/20
The who command. The Multics who command. 21K 08/10/20
Multics Leap Year Calculations. Y2K was anticipated as early as 1966. 14K 08/10/20
Priority Scheduling. HLSUA Presentation, Forum XXV. 173K 08/10/20
"And They Argued All Night...". The history of the Internet. An article for Matrix News. 39K 08/10/20
Multics Library Processes and Tools. How Multics source and object libraries were managed. 23K 08/10/20
Record Stocks and the Physical Volume Scavenger. Record Stocks in Multics. Pages are allocated to segments so crash recovery is safe and fast. 28K 08/13/20
Multics and Hyperchannel. A project at ASEA to connect Multics to Modcomp computers via Hyperchannel. 15K 08/10/20
Multics Bootstrap Loading. The evolution of Multics bootstrap loading and BOS. 49K 08/10/20
TMG. The language used to build EPL. 23K 08/10/20
Version I PL/I Timeline. Development history of Multics Version 1 PL/I compiler. 19K 08/10/20
TBL - Table Building Language. Internal details of the Multics PL/I compiler. 9K 08/10/20
Final Evaluation Report of Honeywell Multics MR 11.0. 36 MB PDF. 6204K 08/10/20
The B2 Final Evaluation Report. Report on NSA Evaluation of Multics security. 16K 08/10/20
The Multics Scheduler. Three generations of Multics scheduling algorithms. 37K 08/10/20
Trouble Report System. The system for handling Multics trouble reports. 25K 08/10/20
The Reduction Compiler. A tool we used to build tools in Multics. 28K 08/10/20
Debug Breakpoint Handling. The sequence of events in a debug breakpoint. 81K 08/10/20
Code Auditing. The informal code review process used in Multics. 33K 08/10/20
PL/I. The history of EPL, Version 1 and Version 2 PL/I, as well as related topics. 62K 08/10/20
Development Process History. History of the Multics development process. 35K 08/10/20
B2 Security Evaluation. The history of Multics security features and the NCSC Orange Book security evaluation of Multics in the mid-80s. 147K 10/03/20
Communications and Networking. The evolution of Multics communication and networking facilities. 139K 08/10/20
Development Process. The Multics development process. 79K 08/10/20
Multics Failure Recovery. How Multics recovered from hardware and software failures. 64K 09/09/20
Execution Environment. The execution environment for Multics programs. Hardware architectural support and system conventions. 148K 09/09/20
The Computer Utility and the Community. 1967 paper describing the social imact of time-sharing and remote access. IEEE International Convention, 1967. 40K 08/10/20
Source Code. Index to source code modules on this site. 15K 08/11/20
source-index.pl1. Index to Multics source files by library and bound segment. 1850K 08/10/20
activate.pl1. PL/I source of File system module activate.pl1 30K 08/10/20
link_snap.pl1. PL/I source of dynamic linker. 43K 08/10/20
pxss.alm. ALM source of Multics scheduler. 176K 08/10/20
fim.alm. ALM source file for the Fault Interceptor Module. 115K 08/10/20
vtoc_man.pl1. PL/I source of the Multics storage system VTOC manager. 53K 08/10/20
dialup_.pl1. PL/I source of answering service module dialup_.pl1 177K 08/10/20
bound-info-rtns.s.archive. PL/I source of 12 Multics user ring programs. 391K 08/10/20
calendar.pl1. PL/I source of user command calendar.pl1 60K 08/10/20
bigletter_.pl1. PL/I source of utility module used in printer head page. 28K 08/10/20
mxload - Read Multics Backup Tapes. Description of mxload tools for reading Multics backup tapes. 17K 08/10/20
Development Documents. Internal documents produced during system development 29K 08/10/20
Multics Design Notebook, Section I: Introduction. Very early design documents. 17K 09/15/20
Multics System Programmer's Manual Table of Contents 187K 10/23/20
MSPM BA.1    MSPM - General Information. Early 1960s design for Multics. 9K 09/15/20
MSPM BA.2    Summary of Multics technical policy. Key early decisions. 11K 09/15/20
MSPM BA.3.00 Documentation Conventions. Rules for MSPM 12K 09/15/20
MSPM BB.2    System Module Interfaces (PL/I Subset for System Programming) 24K 08/10/20
MSPM BB.2.01 EPL Subset for System Programming. Definition of REPL. 11K 09/15/20
MSPM BB.3.01 Multics Standard Magnetic Tape Format 14K 09/15/20
MSPM BX.1.00 Multics Command Language. Language implemented by the shell. 24K 09/15/20
Index to MCBs. Multics Checkout Bulletins 39K 10/23/20
Index to MABs. Multics Administrative Bulletins 17K 10/23/20
Index to MTBs. Multics Technical Bulletins 241K 10/23/20
Index to MSBs. Multics Staff Bulletins 35K 10/23/20
Index to MCRs. Multics Change Requests 610K 10/23/20
AG91 TOC. Table of Contents of the Multics Programmer's manual: Reference Guide. 128K 08/10/20
AW17 Commands and Active Functions. List of Multics commands 101K 09/15/20
Segment Name Suffixes. List of legal segment name suffixes. 21K 08/10/20
Rules for the Multics Change Review Board. MAB-048 26K 09/15/20
Multics Simulator. About the SIMH based simulator for the Honeywell 6180 (DPS8M). 28K 08/10/20
Slides from VCF. Talk on DPS8M simulator, 11 Feb 2018. 860K 08/10/20
Notes pages from VCF. Talk on DPS8M simulator, 11 Feb 2018. 641K 08/10/20
Multics Simulator Instructions. Cookbook for downloading and setting up the simulator. 15K 08/10/20
Multics Simulator Instructions for Linux. Cookbook for downloading and setting up the simulator. 26K 08/10/20
Multics Simulator Instructions for macOS. Cookbook for downloading and setting up the simulator. 26K 08/10/20
Multics Simulator Instructions for Raspberry Pi. Cookbook for downloading and setting up the simulator. 26K 08/10/20
Multics Simulator Instructions for windows. Cookbook for downloading and setting up the simulator. 27K 08/10/20
Performance of the Multics Simulator on Raspberry Pi. Vince Scarafino's performance test of the simulator on a Raspberry Pi. 14K 08/10/20
Software Development Procedures for the Multics Simulator. How software changes for the simulator are proposed, made, and built. 21K 08/10/20
Sites. Listing of all Multics sites. 65K 10/22/20
Site Timeline. Graphical display of site history. 65K 10/22/20
Site History: AFDSC. US Air Force Data Services Center, Pentagon 22K 08/10/20
Site History: ASEA. ASEA, Västerås, Sweden 20K 08/10/20
Site History: Avon. Avon Universities Computing Centre, Bristol, England 41K 08/10/20
Site History: Bell Canada. Bell Canada, 2 sites 34K 08/10/20
Site History: CISL. Honeywell Cambridge Information Systems Laboratory, Cambridge MA 19K 08/10/20
Site History: DND-H. Canadian Department of National Defence, Halifax NS 26K 08/10/20
Site History: DOCKMASTER. US National Security Agency, Linthicum MD 27K 08/10/20
Site History: Ford. Ford Motor Company, Detroit, MI 25K 08/10/20
More Pictures of the Ford Multics Decomissioning. Cake at the Wake. 13K 08/10/20
Site History: GM. General Motors Corporate, Detroit, MI 28K 08/10/20
Site History: Mainz. Johannes Gutenberg Universitaet Mainz 27K 10/14/20
Site history: MIT. Massachusetts Institute of Technology, Cambridge, MA 30K 08/10/20
MIT Photos. MIT Multics Contract Signing event, 1980s 7K 08/10/20
MIT and BTL Hardware (1967) 14K 08/10/20
Site History: NWGS. US Navy Naval War Games system, 4 sites. 26K 08/10/20
Development of an Expert System Environment for use with a War Gaming System. 1988 AI and Computer Simulation Conference paper 181K 08/10/20
User Considerations and their Impact on an Expert System Building Tool for War Gaming. 1988 Eastern Computer Simulation Conference paper 1245K 08/10/20
Site History: OU. Oakland University, Rochester MI 22K 08/10/20
Site History: PRHA. Puerto Rican Highway Authority, San Juan, PR 21K 10/06/20
Site History: RADC. Rome Air Development Center, Griffiss AFB, Rome NY 29K 08/10/20
Site History: RAE. Royal Aircraft Establishment, Farnborough, Hampshire, England 16K 08/10/20
Site History: STC. Standard Telephones and Cables, New Southgate, London, England 25K 08/10/20
Site History: System M. Honeywell System M, Phoenix AZ 18K 08/10/20
Site History: CNO. Honeywell Corporate Network Operations, Minneapolis MN 29K 08/10/20
Pictures of CNO Multicians. Thanks to Dave Jordan 19K 08/10/20
Site History: System X. Bull Systeme X, Louveciennes, France 17K 08/10/20
Site History: UC & ACTC. University of Calgary, Calgary, Alberta, Canada 21K 08/10/20
Site History: USGS. US Geological Survey, 3 sites 21K 09/15/20
Site History: USL. University of Southwestern Louisiana, Lafayette LA 22K 08/10/20
Site History: VPI. Virginia Tech, Blacksburg VA 18K 08/10/20
About the Website. Administrative information. 22K 08/10/20
Web Site Design. Site design principles. 70K 09/08/20
Maintenance task documentation. Site maintenance instructions. 53K 08/10/20
Build process for Build process for 67K 10/07/20
Dashboard File. Description of summary counts. 14K 08/10/20
Dashboard File. Summary counts. 1K 08/10/20
Changes. Reverse chronological list of website changes this year. 18K 10/25/20
Changes 1994-2019. Website changes in prior years. 343K 08/10/20
News. Current events involving Multics 24K 08/19/20
Links. Links to other sites on the Web relevant to Multics. 60K 08/10/20
Image Gallery. Thumbnails of images on the site. 241K 08/10/20
Site Map 0K 10/25/20

726 MTBs are not listed: see the MTB Index. 84 MSBs are not listed: see the MSB Index. 11 MABs are not listed: see the MAB Index.