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Ivan Sutherland Sketchpad Demo 1963

Interface Studies · demo · Watch on YouTube

GUI, HCI & interface historyHistory of computingComputer graphics & rendering

What it is

A TV show about Ivan Sutherland's 1963 MIT thesis software Sketchpad, which ran on the TX-2 computer. It shows a light pen drawing, constraints, snapping, scaling and object-style graphics, foundations of GUIs and CAD.

Why Hacker News recommends it

HN returns to it as a striking demonstration that core GUI, CAD and constraint-programming ideas existed in the 1960s.

  • 5 people recommended it
  • 5 different months
  • 2 strong recommendations
  • first 2016, last 2025

What HN commenters said

  1. “I recommend watching all the videos in full to get a proper sense of context”

    Sketchpad demo as pinnacle of good computer design.

    i336_, 2016-12 · Strong recommendation · in “Computer Vision in 1982 Using Altair Computers and a Cromemco Cyclops Camera”

  2. “It blows me away that this kind of UI was even conceived in the 1960s.”

    Sketchpad features like snapping and scaling were conceived in the 1960s.

    ivanmaeder, 2018-10 · Strong recommendation · in “Ask HN: What are some of the best technical talks you've heard?”

  3. “Ivan Sutherland's Sketchpad demo - Object oriented graphics using a constraint based system”

    Sketchpad demo: object-oriented graphics with constraints.

    infinite8s, 2016-06 · Recommendation · in “Alan Kay on the misunderstanding of OOP (1998)”

  4. “Every now and then I re-watch "The Mother of All Demos" [1] from 1968”

    Re-watched demo of Sutherland's GUI-based CAD system.

    ralferoo, 2024-06 · Recommendation · in “Igneous Linearizer: semi-structured source code”

  5. “Take this CAD demo from MIT back in 1963 showing features that I commonly use today”

    1963 MIT CAD demo with features still used today.

    a1371, 2025-08 · Recommendation · in “The man with a Home Computer (1967) [video]”

Excerpts from Hacker News comments, linked to the originals. Summaries and labels were written by a language model from those comments.

Topics: sketchpad, ivan sutherland, cad, constraints, light pen, hci history

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