On 15 February 1946, ENIAC, the first electronic general-purpose computer, was formally dedicated at the University of Pennsylvania in Philadelphia.

Weight: About 30 tons.Footprint: About 1,500 square feet.

Storage: Twenty 10 digit numbers.

Computing capability: Originally designed for computing ballistic tables (ENIAC was not originally a general purpose computer but changes allowed for other computations, although programming was *very* difficult).

Programming time: Typically multiple days per program since you had to rewire a patch panel each time you wanted to change the program. The patch panel was the actual instruction store.

Logic elements: 17,500 vacuum tubes, 6,000 switches, 1,500 relays.

Computing rate: Up to 5,000 additions per second.

Power requirements: About 175,000W, (a smart phone usually requires 5W or less).

Cost: About $400,000 (in 1946 dollars – about $5.7million in today’s money).

Mine cost a bit less and is a tad more portable … grateful for progress!
PS used this net pic before but it seems appropriate!


  1. My first computer took up the entire corner of the room and was heavy. Today I have a laptop and a smartphone, much lighter computers. Thank you for reminding me how technology is moving forward.
    Best wishes

    Liked by 1 person

  2. It’s didn’t make it into the shop shelves I imagine. 😉
    The phone in our pockets are more powerful than the supercomuters of the 80’s used to predict weather. It’s incredible isn’t it?

    Liked by 1 person

    • Not necessarily, there’s ethical and technical issues with that. Most of us have our own microchip in our hands anyways.
      I think that quantum computing is next with artificial intelligence as well. What that will bring I have no idea…


      • Nope, that’s not going to happen for a while I don’t think and besides they can’t just put it in you and hope it works.
        I know and that’s the media, the reality is that there’s exciting possibilities to come from it.


  3. This is so interesting and amazing!
    Back in the Dark Ages, when I was a little girl, we got to visit a city’s phone company and the computer system than ran the phone company/phones, etc. filled a HUGE room.
    And now we carry a computer in our pockets. 🙂
    HUGS!!! 🙂

    Liked by 1 person

  4. It still astounds that we went from that behemoth to a device you can hold in your hand and slip into your pocket in about 60 years. Technology is wonderful and terrible at the same time!

    Liked by 1 person

    • Well I am old though, not that old. When I studied there was no Internet, no email. That all happened a few years after. So I have been learning too. I don’t know much about the Internet. I know more about business systems. And my skill other than that are all self taught. Lol

      Liked by 1 person

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