I first saw the "baby" on a Pathe News Reel in a cinema,it just looked like a load of tangled cables not doing anything,and wished it would get on with what ever it was going to do so that the feature film could start.
Never thought I would be writing about it 60 yrs on
Yes, it is. An electron beam 'wrote' small charges as 0 or 1 on the cathode ray tube's phosphor coating. These charges decayed rapidly, so the developers used a technique called regeneration to read and write the charges continuously, so the information could be retained, and displayed as white dots on the screen.
The screens they used were tiny and circular, about six inches across, but by the end of 1947 the process had advanced to the point where it was storing 2048 bits on a screen that size.