Since I have no idea where in all of the Stack Exchange to ask this question, I presume this is the place with the higher probability where someone can answer it. I don't see this getting answered in SE Movies.
In AMC's Halt and Catch Fire TV series, its intro at some point shows a Windows-like logo image. What is the image alluded for? Since it was before the rising of Windows and GUI.
Here is where you can watch the intro: http://www.artofthetitle.com/title/halt-and-catch-fire/
