The IBM 2250 Graphics Display Unit (1964-1977)which was a pioneering vector graphics system introduced in 1964,it utilises a light pen to interact directly with the screen, an early form of graphical interface used for tasks like CAD (Computer-Aided Design) | TheaterFire

The IBM 2250 Graphics Display Unit (1964-1977)which was a pioneering vector graphics system introduced in 1964,it utilises a light pen to interact directly with the screen, an early form of graphical interface used for tasks like CAD (Computer-Aided Design)

Posted by Front-Coconut-8196@reddit | vintagecomputing | View on Reddit | 1 comments

The IBM 2250 Graphics Display Unit (1964-1977)which was a pioneering vector graphics system introduced in 1964,it utilises a light pen to interact directly with the screen, an early form of graphical interface used for tasks like CAD (Computer-Aided Design)

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justeUnMec@reddit

One of the simplest and easiest to implement interaction technologies back in the days of CRT, not an uncommon DIY project as it only required a photodiode, wire, and a BIC casing.