John Von Neumann and his machine at Princeton Institute of Advanced Studies. Used Williams tubes (CRTs) as memory devices, but used his stored-program concept, thus modern systems are mostly based on Von Neumann architecture. (Photo from Computer History Museum).
Johnny von Neumann "Perhaps the consciousness of animals is more shadowy than ours and perhaps their perceptions are always dreamlike. On the opposite side, whenever I talked with von Neumann, I always had the impression that only he was fully awake." (Eugene Wigner)