Sketchpad - Wikidata

1963 computer program written by Ivan Sutherland

Modelling with constraints: theoretical foundation and application

File:Tesla Easter Egg Sketch Pad.jpg - Wikimedia Commons

The Draughtsman's Contract (1982) : r/CineShots

sketchbook - Wikidata

Mountain View at Bormio (from Switzerland 1869 Sketchbook) - Wikidata

File:Marguerite Martyn draws Senator Reed Smoot of Utah, 1909.jpg - Wikipedia

Art Academy: Second Semester, Ultimate Pop Culture Wiki

VKC The Flemish Art Collection

Sketchpad - Wikidata

File:Bohnenstengel, A. (2003) Bayern 02 Seite 04 und 05.jpg - Wikimedia Commons

Dancers and Performers (Page from a Sketchbook) - Wikidata

Four sketches (from Sketchbook) - Wikidata

Sketchbook - Wikidata

Dancers and Performers (Page from a Sketchbook) - Wikidata