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ADM-3A: History, Legacy & Measurement

The ADM-3A is an early influential video display terminal, introduced in 1976. It was manufactured by Lear Siegler and has a 12-inch screen displaying 12 or 24 lines of 80 characters. It set a new industry low single unit price of $995. Its "dumb terminal" nickname came from some of the original trade publication advertisements. It quickly became…

Language: English [EN]
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ADM-3A topic overview

The analysis highlights History, Legacy and Measurement as prominent areas in the source structure around ADM-3A.

Related topics
46
Source areas
7
Connected nodes
53
Extracted relationships
65
Concept neighborhoods
19
Bridge connections
53

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.

Legacy · 21 topics
Hardware · 8 topics
ADM-3 · 5 topics
Overview · 5 topics
ADM-3 options · 3 topics
ADM-3A · 3 topics
History · 1 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.

Introductory price
US$995 (equivalent to $5,600 in 2025)
Manufacturer
Lear Siegler
Released
1976 (1976)
Type
Computer terminal

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

ADM-3

ADM-3 options

ADM-3A

Hardware

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 ADM-3A connects Entity context

The extracted context around ADM-3A shows recurring relationship patterns in the source. For example, ADM-3A → Also, ASCII, Berkeley, California, Ctrl, DIP, HJKL, Home, Ritchie, Teletype Model, The, The Ctrl, The Home, Thompson, University, Unix Another extracted example is ADM-3A → Archived, Digital Engineering, FreeBSD, Gangwere, Inc, Lear Siegler ADM-3A, LSI, Morgan, Old, Quelab, Retrieved, Retrographics RG-512, Siegler, Siegler ADM, Terminal ADM3A. Use these groups to spot repeated connection types before inspecting the individual relationships.

ADM-3A

Top relations

related to Legacy · 16
ADM-3A → Also, ASCII, Berkeley, California, Ctrl, DIP, HJKL, Home, Ritchie, Teletype Model, The, The Ctrl, The Home, Thompson, University, Unix
related to External links · 15
ADM-3A → Archived, Digital Engineering, FreeBSD, Gangwere, Inc, Lear Siegler ADM-3A, LSI, Morgan, Old, Quelab, Retrieved, Retrographics RG-512, Siegler, Siegler ADM, Terminal ADM3A
related to ADM-3A · 10
ADM-3A → ADM-3, DIP, In, It, Like, The, The ADM-3A, The ADM-3A's, VT100, VT52
related to Hardware · 10
ADM-3A → Ball Brothers, CRT, Datapoint, It, RAM, The, The CRT, TTL, Unlike, VT100
related to ADM-3 options · 9
ADM-3A → ADM-3, ADM-3As, Further, In, Likewise, RAM, RS-232, Tektronix, The
Introductory price · 1
ADM-3A → US$995 (equivalent to $5,600 in 2025)
Manufacturer · 1
ADM-3A → Lear Siegler
Released · 1
ADM-3A → 1976 (1976)
Type · 1
ADM-3A → Computer terminal
is a · 1
ADM-3A → early influential video display terminal

Important terminology

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

Important terminology

terminal original adm-3 keyboard computer 1976 position terminals adm-3a's keys use ctrl display characters single new also lear siegler 995

ADM-3A relationships Subject–Predicate–Object triples

TTTA extracted 65 structured relationships around ADM-3A. Examples in this analysis include ADM-3A → Introductory price → US$995 (equivalent to $5,600 in 2025) and ADM-3A → Manufacturer → Lear Siegler. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
ADM-3AIntroductory priceUS$995 (equivalent to $5,600 in 2025)1.00infobox
ADM-3AManufacturerLear Siegler1.00infobox
ADM-3AReleased1976 (1976)1.00infobox
ADM-3ATypeComputer terminal1.00infobox
ADM-3Ais aearly influential video display terminal0.90text
ADM-3Arelated to ADM-3 optionsThe0.60section
ADM-3Arelated to ADM-3 optionsADM-30.60section
ADM-3Arelated to ADM-3 optionsIn0.60section
ADM-3Arelated to ADM-3 optionsRAM0.60section
ADM-3Arelated to ADM-3 optionsLikewise0.60section
ADM-3Arelated to ADM-3 optionsFurther0.60section
ADM-3Arelated to ADM-3 optionsTektronix0.60section

Related concept clusters Concept neighborhoods

The concept neighborhoods around ADM-3A bring nearby vocabulary together. In this analysis, examples include Introduced, Terminal and Display. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • ADM-3A
    • Introduced
    • Terminal
    • Display
    • Lear
    • Siegler
    • Lsi
    • Cursor
    • Terminals
    • Use
    • Adm-3
    • Early
    • Price
  • adm-3a
    • Introduced
    • Terminal
    • Display
    • Lear
    • Siegler
    • Lsi
    • Cursor
    • Terminals
    • Use
    • Adm-3
    • Early
    • Price
  • 1975 national computer conference
    • Systems
    • Price
    • Released
    • Adm-3
    • Manufactured
    • Also
    • Lear
    • Siegler
    • Introduced
    • Lsi
    • Needed
    • New
  • video display terminal
    • Terminal
    • Adm-3
    • Early
    • Lear
    • Price
    • Released
    • Siegler
    • Case
    • Control
    • Introduced
    • Lsi
    • Manufactured
  • adm-3
    • Computer
    • Price
    • Terminal
    • Manufactured
    • Also
    • Display
    • Original
    • Adm-3a
    • Lear
    • Released
    • Siegler
    • Case
  • adm-3 options
    • Computer
    • Price
    • Terminal
    • Manufactured
    • Also
    • Display
    • Original
    • Adm-3a
    • Lear
    • Released
    • Siegler
    • Case
  • control key
    • Position
    • Cursor
    • Key
    • Needed
    • Systems
    • Ctrl
    • Use
    • Keyboard
    • Original
    • Printed
    • Required
    • Screen
  • keyboard layout
    • Adm-3a's
    • Original
    • Key
    • Keys
    • Position
    • Use
    • Control
    • Needed
    • Systems
    • Single
    • Used
    • Ctrl

Connections between topic areas Semantic bridges

For ADM-3A, one of the stronger structural bridges in this analysis connects ADM-3A with Legacy. 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
ADM-3A — Legacy · splits 32 ⟂ 22
ADM-3A — Hardware · splits 45 ⟂ 9
ADM-3A — Overview · splits 48 ⟂ 6
ADM-3A — ADM-3 · splits 48 ⟂ 6
ADM-3A — ADM-3 options · splits 50 ⟂ 4
ADM-3A — ADM-3A · splits 50 ⟂ 4

Map overview Semantic statistics

ADM-3A

Nodes54
Edges53
Triples65
Avg. degree1.96
Density0.037037
Components1

Source & methodology

TTTA analyzes the structure around ADM-3A 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 — ADM-3A · EN edition · Analysis: TopicsToTalkAbout

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