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IBM PCjr: History, Legacy & Measurement

The IBM PCjr (pronounced "PC junior") is a home computer produced and marketed by IBM from March 1984 to May 1985. It was intended as a lower-cost variant of the IBM PC, with hardware capabilities better suited for video games, in order to compete more directly with other home computers such as the Apple II and Commodore 64.

Language: English [EN]
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IBM PCjr topic overview

The analysis highlights History, Legacy and Measurement as prominent areas in the source structure around IBM PCjr.

Related topics
80
Source areas
6
Connected nodes
86
Extracted relationships
37
Concept neighborhoods
27
Bridge connections
86

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.

Hardware · 22 topics
History · 22 topics
Overview · 21 topics
Legacy · 10 topics
Models · 3 topics
Software · 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.

CPU
Intel 8088 @ 4.77 MHz
Discontinued
March 1985
Display
12" TTL RGBI monitor, composite video out (TV); 160 × 200 and 320 × 200 at 16 colors, 640 × 200 at 4 colors
Graphics
Motorola 6845 CRTC, IBM custom Video Gate Array
Introductory price
US$1,269 (equivalent to $3,930 in 2025) with 128 KB memory and without monitor. · £800 (equivalent to £2,610 in 2025) w/o disk drive. · CA$1,900
Manufacturer
Teledyne, Lewisburg, Tennessee

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

Models

Hardware

Software

History

Legacy

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 IBM PCjr connects Entity context

The extracted context around IBM PCjr shows recurring relationship patterns in the source. For example, IBM PCjr → Christmas, PCjr BattleThe IBM PCjr, The Great Apple, User's Guide Another extracted example is IBM PCjr → CA$1,900, US$1,269 (equivalent to $3,930 in 2025) with 128 KB memory and without monitor., £800 (equivalent to £2,610 in 2025) w/o disk drive.. Use these groups to spot repeated connection types before inspecting the individual relationships.

IBM PCjr

Top relations

related to External links · 4
IBM PCjr → Christmas, PCjr BattleThe IBM PCjr, The Great Apple, User's Guide
Introductory price · 3
IBM PCjr → CA$1,900, US$1,269 (equivalent to $3,930 in 2025) with 128 KB memory and without monitor., £800 (equivalent to £2,610 in 2025) w/o disk drive.
CPU · 1
IBM PCjr → Intel 8088 @ 4.77 MHz
Discontinued · 1
IBM PCjr → March 1985
Display · 1
IBM PCjr → 12" TTL RGBI monitor, composite video out (TV); 160 × 200 and 320 × 200 at 16 colors, 640 × 200 at 4 colors
Graphics · 1
IBM PCjr → Motorola 6845 CRTC, IBM custom Video Gate Array
Manufacturer · 1
IBM PCjr → Teledyne, Lewisburg, Tennessee
Memory · 1
IBM PCjr → 64 KB base
Operating system · 1
IBM PCjr → IBM PC DOS 2.10
Predecessor · 1
IBM PCjr → IBM Personal Computer

Important terminology

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

Important terminology

pcjr ibm pc software computer video kb keyboard home cga memory system 1984 new market also would expansion pcjr's apple

IBM PCjr relationships Subject–Predicate–Object triples

TTTA extracted 37 structured relationships around IBM PCjr. Examples in this analysis include IBM PCjr → CPU → Intel 8088 @ 4.77 MHz and IBM PCjr → Discontinued → March 1985. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
IBM PCjrCPUIntel 8088 @ 4.77 MHz1.00infobox
IBM PCjrDiscontinuedMarch 19851.00infobox
IBM PCjrDisplay12" TTL RGBI monitor, composite video out (TV); 160 × 200 and 320 × 200 at 16 colors, 640 × 200 at 4 colors1.00infobox
IBM PCjrGraphicsMotorola 6845 CRTC, IBM custom Video Gate Array1.00infobox
IBM PCjrIntroductory priceUS$1,269 (equivalent to $3,930 in 2025) with 128 KB memory and without monitor.1.00infobox
IBM PCjrIntroductory price£800 (equivalent to £2,610 in 2025) w/o disk drive.1.00infobox
IBM PCjrIntroductory priceCA$1,9001.00infobox
IBM PCjrManufacturerTeledyne, Lewisburg, Tennessee1.00infobox
IBM PCjrMemory64 KB base1.00infobox
IBM PCjrOperating systemIBM PC DOS 2.101.00infobox
IBM PCjrPredecessorIBM Personal Computer1.00infobox
IBM PCjrReleasedMarch 1984; 42 years ago (1984-03)1.00infobox
IBM PCjrRemovable storageCartridges, floppy disks1.00infobox
IBM PCjrSoundTexas Instruments SN76489, PC speaker1.00infobox
IBM PCjrSuccessorIBM PS/11.00infobox
IBM PCjrTypePersonal computer1.00infobox
IBM PCjrUnits shipped500,0001.00infobox

Related concept clusters Concept neighborhoods

The concept neighborhoods around IBM PCjr bring nearby vocabulary together. In this analysis, examples include Pc, Pcjr and Would. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • IBM PCjr
    • Pc
    • Pcjr
    • Would
    • Computer
    • New
    • Market
    • Home
    • System
    • Video
    • Compatible
    • Computers
    • Many
  • ibm pcjr
    • Pc
    • Pcjr
    • Software
    • Would
    • Computer
    • New
    • Video
    • Market
    • Home
    • Memory
    • System
    • Compatible
  • home computer
    • Computer
    • Home
    • Computers
    • Market
    • Ibm's
    • Pc
    • Would
    • Units
    • Compatible
    • Ibm
    • Software
    • Apple
  • ibm
    • Pc
    • Pcjr
    • Would
    • Computer
    • New
    • Market
    • Home
    • Video
    • Compatible
    • Computers
    • Many
    • Keyboard
  • ibm pc
    • Pcjr
    • Pc
    • Software
    • Compatibility
    • Kb
    • Would
    • Memory
    • Computer
    • Hardware
    • New
    • Many
    • Market
  • apple ii
    • Computers
    • Home
    • Kb
    • Price
    • Compatible
    • Sold
    • Pcjr's
    • Computer
    • Drive
    • Floppy
    • Pc
    • Hardware
  • ibm pc compatible
    • Pcjr
    • Pc
    • Software
    • Compatibility
    • Kb
    • Would
    • Home
    • Memory
    • Computer
    • Hardware
    • New
    • Many
  • chiclet keyboard
    • Price
    • Memory
    • Disk
    • Sound
    • Compatibility
    • Compatible
    • Drive
    • Expansion
    • Sold
    • Pcjr's
    • Would
    • New

Connections between topic areas Semantic bridges

For IBM PCjr, one of the stronger structural bridges in this analysis connects IBM PCjr with Hardware. 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
IBM PCjr — Hardware · splits 64 ⟂ 23
IBM PCjr — History · splits 64 ⟂ 23
IBM PCjr — Overview · splits 65 ⟂ 22
IBM PCjr — Legacy · splits 76 ⟂ 11
IBM PCjr — Models · splits 83 ⟂ 4
IBM PCjr — Software · splits 84 ⟂ 3

Map overview Semantic statistics

IBM PCjr

Nodes87
Edges86
Triples37
Avg. degree1.98
Density0.022989
Components1

Source & methodology

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

Source: Wikipedia — IBM PCjr · EN edition · Analysis: TopicsToTalkAbout

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