Sketchpad a Man-Machine Graphical Communication System - Ivan E. Sutherland, 1964

Sketchpad - Wikipedia

How the Graphical User Interface Was Invented - IEEE Spectrum

Ivan Sutherland - Father of Computer Graphics

Sutherland's Sketchpad: (a) Ivan Sutherland working with Sketchpad; (b)

PDF) Sketch pad a man-machine graphical communication system

How the Graphical User Interface Was Invented - IEEE Spectrum

Sketchpad a Man-Machine Graphical Communication System - Ivan E. Sutherland, 1964

No-code History: Sketchpad - A man-machine graphical communication system (1963)

3D Modelling Specialisation

50 Years of CAD

No-code History: Sketchpad - A man-machine graphical communication system (1963)

Graphical user interface (GUI)

Man-Machine Console Facilities for Computer-Aided Design - Robert Stotz, 1964