In the 1950’s, output are via teletypes, lineprinter, and Cathode Ray Tube (CRT). Using dark and light characters, a picture can be reproduced.
1950: Ben Laposky created the first graphic images, an Oscilloscope, generated by an electronic (analog) machine. The image was produced by manipulating electronic beams and recording them onto high-speed film.
1951: UNIVAC-I: the first general purpose commercial computer, crude hardcopy devices, and line printer pictures.
1951: MIT – Whirlwind computer, the first to display real time video, and capable of displaying real time text and graphic on a large oscilloscope screen.