Plus/4

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Plus/4 topic overview

The analysis highlights History, Products and Art as prominent areas in the source structure around Plus/4.

Related topics: 118
Source areas: 10
Connected nodes: 128
Extracted relationships: 233
Concept neighborhoods: 35
Bridge connections: 128

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 · 40 topics

History · 21 topics

Software · 14 topics

Reception · 12 topics

Peripherals · 10 topics

Adoption · 7 topics

Overview · 7 topics

Reliability · 3 topics

Performance · 2 topics

Succession · 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: MOS Technology 7501 or 8501 @ 1.76 MHz
Discontinued: 1985
Graphics: TED (320 × 200, 121 colors)
Introductory price: US$299 (equivalent to $930 in 2025)
Manufacturer: Commodore Business Machines
Memory: 64 KB RAM + 64 KB ROM

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

Peripherals

Datasette Commodore Datasette
Centronics
Productivity applications Productivity software
Atari Atari 2600
Joystick
Proprietary Proprietary hardware
RF Radio frequency
Mouse Computer mouse
GUI Graphical user interface
GEOS GEOS (8-bit operating system)

Performance

Shared memory Shared graphics memory
Machine code

Reliability

ICs Integrated circuit
HMOS Depletion-load NMOS logic
Power supply Power supply unit (computer)

Reception

INFO Info (magazine)
Ford Edsel
Compute!'s Gazette
The Emperor's New Clothes
Sweepstakes
Tandy Tandy Corporation
TRS-80 Model I
Apple IIc
Apple II
Lowest common denominator Instruction selection
Mail order
TRS-80 CoCo TRS-80 Color Computer

Adoption

Succession

Commodore 128
Hardware and software compatible Backwards compatibility

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 Plus/4 connects Entity context

The extracted context around Plus/4 shows recurring relationship patterns in the source. For example, Plus/4 → AC, BASIC, C128, C64, Commodore, Commodore BASIC, Composite, CPU, Datassette, DC, DIN, Graphics, I/O, It, KB, MBROM, MHz, MOS Technology, MOS Technology TED, NTSC Another extracted example is Plus/4 → All, C116, C16, C64, Commodore, Commodore's, Commodore's MOS Technology, Commodore's PET, Companies, CPUs, Even, I/O, In, Jack Tramiel, KB, Later, MOS, MOS Technology TED, Plus/4's, ROM. Use these groups to spot repeated connection types before inspecting the individual relationships.

Top relations

related to Specifications · 38

Plus/4 → AC, BASIC, C128, C64, Commodore, Commodore BASIC, Composite, CPU, Datassette, DC, DIN, Graphics, I/O, It, KB, MBROM, MHz, MOS Technology, MOS Technology TED, NTSC

related to history · 36

Plus/4 → All, C116, C16, C64, Commodore, Commodore's, Commodore's MOS Technology, Commodore's PET, Companies, CPUs, Even, I/O, In, Jack Tramiel, KB, Later, MOS, MOS Technology TED, Plus/4's, ROM

related to Application software · 21

Plus/4 → Anderson, Better, BYTE, C64, Commodore, Creative Computing, Further, In, INFO, It, John, Minus, Multiplan, Plus, Plus/4's, ROM-resident, Since IBM, The, The Plus/4, The Transactor

related to Reception · 20

Plus/4 → Apple II, Apple IIc's, C64, Commodore's, Compute, Computer, Even, Ford Edsel, Gazette, He, INFO, Is, It's, July, Many, Steve Leininger, Sure, Tandy TRS-80 Model, The, The Emperor's New Clothes

related to Adoption · 16

Plus/4 → Approximately, C116s, C16s, C64s, Christmas, Commodore's, Denmark, Germany, In, North American, Of, Outgoing, Plus/4s, TDC A/S, The Plus/4, Vice

related to External links · 16

Plus/4 → Bo Zimmermann's CBM, C16, Canadian CBM, Commodore, Commodore Plus/4 YouTube, Commodore16, Documentation, End, Hardware, PRG, Series, TAP, TED, The Beginning, V364, World

related to Performance · 16

Plus/4 → BASIC, BASIC ROM, C64, C64's, CPU, However, MHz, NTSC, Only, PAL, Plus/4's CPU, So, The NTSC, The Plus/4's PAL, This, While

related to Peripherals · 15

Plus/4 → Additionally, Atari-style, C16, C64, Centronics, Commodore, Datasette, DIN, For, Peripheral, RF, Since, The, The Plus/4's, This

related to Input and output · 12

Plus/4 → C64, C64/1541, Commodore, MOS Technology, PET, RS-232, The, The Plus/4, The Plus/4's, This, TTL, UART

related to Reliability · 11

Plus/4 → Autofire-capable, C64, CPU, HMOS, ICs, ICs MOS, Like, MOS, TED, The C16, The Plus/4

Important terminology

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

Important terminology

plus c64 commodore software computer basic ted rom also kb use c16 ram memory graphics used 4's would market vic-20

Plus/4 relationships Subject–Predicate–Object triples

TTTA extracted 233 structured relationships around Plus/4. Examples in this analysis include Plus/4 → CPU → MOS Technology 7501 or 8501 @ 1.76 MHz and Plus/4 → Discontinued → 1985. The table shows each extracted connection, where it came from and its confidence.

Subject	Predicate	Object	Confidence	Src
Plus/4	CPU	MOS Technology 7501 or 8501 @ 1.76 MHz	1.00	infobox
Plus/4	Discontinued	1985	1.00	infobox
Plus/4	Graphics	TED (320 × 200, 121 colors)	1.00	infobox
Plus/4	Introductory price	US$299 (equivalent to $930 in 2025)	1.00	infobox
Plus/4	Manufacturer	Commodore Business Machines	1.00	infobox
Plus/4	Memory	64 KB RAM + 64 KB ROM	1.00	infobox
Plus/4	Operating system	Commodore BASIC 3.5	1.00	infobox
Plus/4	Released	1984; 42 years ago (1984)	1.00	infobox
Plus/4	Sound	TED (2-channel with 4-octave + white noise)	1.00	infobox
Plus/4	Type	Home computer	1.00	infobox
Plus/4	is a	home computer released by Commodore International in 1984	0.90	text
the Leading Edge Model D	instance of	low-cost IBM PC compatibles	0.80	text

Related concept clusters Concept neighborhoods

The concept neighborhoods around Plus/4 bring nearby vocabulary together. In this analysis, examples include C64, Software and 4's. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

Plus/4
- C64
- Software
- 4's
- C16
- Use
- Market
- Kb
- Used
- Basic
- Built-in
- Could
- Users
plus/4
- C64
- Software
- 4's
- C16
- Use
- Market
- Kb
- Used
- Basic
- Built-in
- Could
- Users
home computer
- Market
- Users
- Computer
- Home
- New
- Commodore
- Would
- Plus
- Memory
- Software
- Price
- Vic-20
commodore international
- Software
- Computer
- Use
- Plus
- C64
- Also
- Incompatible
- Used
- Basic
- Hardware
- Price
- Built-in
commodore 16
- Software
- Computer
- Use
- Plus
- C64
- Also
- Incompatible
- Used
- Basic
- Hardware
- Price
- Built-in
commodore 116
- Software
- Computer
- Use
- Plus
- C64
- Also
- Incompatible
- Used
- Basic
- Hardware
- Price
- Built-in
commodore 64
- Software
- Computer
- Use
- Plus
- C64
- Also
- Incompatible
- Used
- Basic
- Hardware
- Price
- Built-in
basic
- Rom
- Kb
- Registers
- Machine
- Ram
- Memory
- Sound
- Available
- Graphics
- Commodore
- C64
- Cpu

Connections between topic areas Semantic bridges

For Plus/4, one of the stronger structural bridges in this analysis connects Plus/4 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

Plus/4 — Hardware · splits 88 ⟂ 41

Plus/4 — History · splits 107 ⟂ 22

Plus/4 — Software · splits 114 ⟂ 15

Plus/4 — Reception · splits 116 ⟂ 13

Plus/4 — Peripherals · splits 118 ⟂ 11

Plus/4 — Overview · splits 121 ⟂ 8

Plus/4 — Adoption · splits 121 ⟂ 8

Plus/4 — Reliability · splits 125 ⟂ 4

Plus/4 — Performance · splits 126 ⟂ 3

Plus/4 — Succession · splits 126 ⟂ 3

Map overview Semantic statistics

Plus/4

Nodes129

Edges128

Triples233

Avg. degree1.98

Density0.015504

Components1

Source & methodology

TTTA analyzes the structure around Plus/4 to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as History, Products & Art, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — Plus/4 · EN edition · Analysis: TopicsToTalkAbout