DYSEAC
DYSEAC was the second Standards Electronic Automatic Computer.
DYSEAC was a first-generation computer built by the National Bureau of Standards for the US Army Signal Corps. It was housed in a truck, making it one of the first movable computers. It went into operation in April 1954.
DYSEAC used 900 vacuum tubes and 24,500 crystal diodes. It had a memory of 512 words of 45 bits each, using mercury delay line memory. Memory access time was 48–384 microseconds. The addition time was 48 microseconds and the multiplication/division time was 2112 microseconds. These times are excluding the memory access time, which added up to approximately 1500 microseconds to those times.
DYSEAC weighed about.
