Dating the h bomb abc


Twenty of these modules were accumulators that could not only add and subtract, but hold a ten-digit decimal number in memory.



So a division or square root took up to 143 cycles, or 28,600 microseconds—a rate of 35 per second.ENIAC's design and construction was financed by the United States Army, Ordnance Corps, Research and Development Command, led by Major General Gladeon M. The total cost was about $487,000, equivalent to $6,887,000 in 2017.the following month, under the code name "Project PX", with John Grist Brainerd as principal investigator. Goldstine persuaded the Army to fund the project, which put him in charge to oversee it for them.A multiplication of a 10-digit number by a d-digit number (for d up to 10) took d 4 cycles, so a 10- by 10-digit multiplication took 14 cycles, or 2800 microseconds—a rate of 357 per second.

If one of the numbers had fewer than 10 digits, the operation was faster.

It had a speed on the order of one thousand times faster than that of electro-mechanical machines; this computational power, coupled with general-purpose programmability, excited scientists and industrialists alike.