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PDP-11: History, Applications, Products & Companies

The PDP-11 is a series of 16-bit minicomputers originally sold by Digital Equipment Corporation (DEC) from 1970 into the late 1990s, one of a set of products in the Programmed Data Processor (PDP) series. In total, around 600,000 PDP-11s of all models were sold, making it one of DEC's most successful product lines. The PDP-11 is considered by some…

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PDP-11 topic overview

The analysis highlights History, Applications, Products and Companies as prominent areas in the source structure around PDP-11.

Related topics
244
Source areas
10
Connected nodes
254
Extracted relationships
477
Concept neighborhoods
37
Bridge connections
254

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Models · 63 topics
Operating systems · 38 topics
Decline · 33 topics
Uses · 24 topics
Overview · 20 topics
Innovative features · 17 topics
History · 16 topics
Peripherals · 16 topics
LSI-11 integrated circuits · 15 topics
Emulators · 2 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Developer
Digital Equipment Corporation
Discontinued
1997; 29 years ago (1997)
Lifespan
1970–1997
Operating system
BATCH-11/DOS-11, DSM-11, IAS, P/OS, RSTS/E, RSX-11, RT-11, Ultrix-11, Seventh Edition Unix, SVR1, 2BSD
Platform
PDP-11 architecture
Product family
Programmed Data Processor

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

History

Innovative features

LSI-11 integrated circuits

Decline

Models

Operating systems

Peripherals

Uses

Emulators

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How PDP-11 connects Entity context

The extracted context around PDP-11 shows recurring relationship patterns in the source. For example, PDP-11 → Bucharest, Bulgaria, CalData, CORAL, Czechoslovakia, DEC OSes, DEC PDP-11, DEC-compatible, DVK, East Germany, Eastern Bloc, Electronika, Electronika BK, FORTRAN, Hungary, IBM PC, ICE Felix, INDEPENDENT, ITC Timișoara, IZOT-1016 Another extracted example is PDP-11 → ALU, ASIC, Atmel, Based, By, DEC Q-Bus PDP-11, DECserver, DMA, DSRVS-BA, Early, F-11, Faster, FPU, High, ICs, Improved, J-11, J11 CPU, Jaws-11, KB. Use these groups to spot repeated connection types before inspecting the individual relationships.

PDP-11

Top relations

related to Unlicensed clones · 55
PDP-11 → Bucharest, Bulgaria, CalData, CORAL, Czechoslovakia, DEC OSes, DEC PDP-11, DEC-compatible, DVK, East Germany, Eastern Bloc, Electronika, Electronika BK, FORTRAN, Hungary, IBM PC, ICE Felix, INDEPENDENT, ITC Timișoara, IZOT-1016
related to Q-bus models · 54
PDP-11 → ALU, ASIC, Atmel, Based, By, DEC Q-Bus PDP-11, DECserver, DMA, DSRVS-BA, Early, F-11, Faster, FPU, High, ICs, Improved, J-11, J11 CPU, Jaws-11, KB
related to Unibus models · 48
PDP-11 → AMD Am2901, Bob Armstrong, CIS, Cost-reduced, DEC Datasystem, Digital Equipment Corporation, F11, First VLSI PDP-11, Floating, Fonz-11, FP, FP11, I/O, It, J11, J11-based, Jaws-11, Jim O'Loughlin, John Sofio, KB
related to Special-purpose versions · 40
PDP-11 → Carnegie Mellon University, Datalogics, Datalogics Pager, DECset, Digital, Digital's VAX/VMS, Early, GT40, GT42, GT44, GT62, H11, Heathkit OEM, HP, HP DECset, Laboratory, LSI-11, LSI-11/03, MINC, MINC-11
related to External links · 38
PDP-11 → ACM SIGARCH Computer Architecture, All Out, Bell, Computer, DEC, DEC Professional, DEC Users, December, DECWORLD, Digital Equipment Corp, Digital Equipment Corporation, Dotzel, Gordon, Gordon Bell's CyberMuseum, Günter, ISSN, January, Massachusetts, May, Maynard
related to From third parties · 36
PDP-11 → ANDOSCSI-DOSDEIMOS, BRL, Champaign/Datalogics, Decus, DEMOS, Denelcor HEPMERTMicropower PascalMK-DOSMONECSMTS, Duress, Edinburgh, Forth, Forth Inc, I/O, Illinois, Infosphere, LOS/C, Multi-Tasking System, MUMPSMUSS-11PC11, PDP-11ROSTTP, Per Brinch HansenSphere, Pilkington, Portland Oregon
related to LSI-11 integrated circuits · 19
PDP-11 → Both, CPU, February, I/O, It, LSI, LSI Bus, LSI-11, MCP-1600, MOSFET, PDP-11/03, Q-Bus, RS-232, The, The CPU, The LSI-11, This, Unibus, Western Digital
related to Models that were planned but never introduced · 18
PDP-11 → Another, Commercial Instruction Set, DEC, I/O, In, Jaws-11, MB, PDP-11's, PDP-11/27, PDP-11/60, PDP-11/68, PDP-11/70, PDP-11/74, RSX-11, The, Up, VAX, VAXBI Bus
related to Further reading · 17
PDP-11 → Applications, Assembler Language Programming, Eckhouse, Englewood Cliffs, ISBN, Jr, Machine Organization, Michael, Minicomputer Systems, Morris, New Jersey, Organization, Prentice-Hall, Programming, Richard, Robert, Wiley
related to Uses · 16
PDP-11 → An, Another, Datanet, In, It, PDP, PDP-11/23, PDP-11s, PRDS, Processed Radar Display System, RAF West Drayton, Some OEM, The, The PDP-11, Therac-25, UK's

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

system memory processor dec 11 set used q-bus unibus instruction models systems also terminal based using operating digital series one

PDP-11 relationships Subject–Predicate–Object triples

TTTA extracted 477 structured relationships around PDP-11. Examples in this analysis include PDP-11 → Developer → Digital Equipment Corporation and PDP-11 → Discontinued → 1997; 29 years ago (1997). The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
PDP-11DeveloperDigital Equipment Corporation1.00infobox
PDP-11Discontinued1997; 29 years ago (1997)1.00infobox
PDP-11Lifespan1970–19971.00infobox
PDP-11Operating systemBATCH-11/DOS-11, DSM-11, IAS, P/OS, RSTS/E, RSX-11, RT-11, Ultrix-11, Seventh Edition Unix, SVR1, 2BSD1.00infobox
PDP-11PlatformPDP-11 architecture1.00infobox
PDP-11Product familyProgrammed Data Processor1.00infobox
PDP-11Released1970; 56 years ago (1970)1.00infobox
PDP-11SuccessorVAX-111.00infobox
PDP-11TypeMinicomputer1.00infobox
PDP-11Units soldaround 600,0001.00infobox
PDP-11is aseries of 16-bit minicomputers originally sold by Digital Equipment Corporation0.90text
CP/Minstance ofinfluenced the design of operating systems0.80text

Related concept clusters Concept neighborhoods

The concept neighborhoods around PDP-11 bring nearby vocabulary together. In this analysis, examples include Processor, Instruction and Set. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • PDP-11
    • Processor
    • Instruction
    • Set
    • Dec
    • System
    • Using
    • Models
    • Used
    • Memory
    • Q-bus
    • Systems
    • Design
  • pdp-11
    • Processor
    • Instruction
    • Set
    • Dec
    • System
    • Using
    • Models
    • Used
    • Memory
    • Q-bus
    • Systems
    • Design
  • digital equipment corporation
    • Equipment
    • Lsi-11
    • Also
    • First
    • Sold
    • Operating
    • Q-bus
    • Processor
    • Systems
    • Cpu
    • Data
    • Models
  • programmed data processor
    • Set
    • Using
    • Instruction
    • Architecture
    • Equipment
    • Q-bus
    • Based
    • Sold
    • Digital
    • One
    • Dec
    • Processor
  • instruction set
    • Instruction
    • Set
    • Using
    • Processor
    • Pdp-11
    • Unibus
    • Would
    • Bus
    • Lsi-11
    • Models
    • Q-bus
    • Cpu
  • direct memory access
    • Kb
    • Bus
    • Unibus
    • Would
    • Pdp-11
    • Using
    • System
    • Peripherals
    • Processor
    • Use
    • Lsi-11
    • Systems
  • data general
    • Equipment
    • Sold
    • Digital
    • One
    • Dec
    • Processor
    • Unibus
    • Set
    • Used
    • Cpu
    • Unix
    • Memory
  • data general nova
    • Equipment
    • Sold
    • Digital
    • One
    • Dec
    • Processor
    • Unibus
    • Set
    • Used
    • Cpu
    • Unix
    • Memory

Connections between topic areas Semantic bridges

For PDP-11, one of the stronger structural bridges in this analysis connects PDP-11 with Models. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
PDP-11 — Models · splits 191 ⟂ 64
PDP-11 — Operating systems · splits 216 ⟂ 39
PDP-11 — Decline · splits 221 ⟂ 34
PDP-11 — Uses · splits 230 ⟂ 25
PDP-11 — Overview · splits 234 ⟂ 21
PDP-11 — Innovative features · splits 237 ⟂ 18
PDP-11 — History · splits 238 ⟂ 17
PDP-11 — Peripherals · splits 238 ⟂ 17
PDP-11 — LSI-11 integrated circuits · splits 239 ⟂ 16
PDP-11 — Emulators · splits 252 ⟂ 3

Map overview Semantic statistics

PDP-11

Nodes255
Edges254
Triples477
Avg. degree1.99
Density0.007843
Components1

Source & methodology

TTTA analyzes the structure around PDP-11 to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as History, Applications, Products & Companies, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — PDP-11 · EN edition · Analysis: TopicsToTalkAbout

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