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- Path: sparky!uunet!mcsun!sunic!dkuug!diku!torbenm
- From: torbenm@diku.dk (Torben AEgidius Mogensen)
- Newsgroups: comp.sys.misc
- Subject: Re: Who invented the digital computer?
- Message-ID: <1992Sep10.100458.22718@odin.diku.dk>
- Date: 10 Sep 92 10:04:58 GMT
- References: <news@ucbvax.Berkeley.EDU> <9209090702.AA17622@ucbvax.Berkeley.EDU>
- Sender: torbenm@freke.diku.dk
- Organization: Department of Computer Science, U of Copenhagen
- Lines: 37
-
- SEWALL@UCONNVM.UCONN.EDU (Murph Sewall) writes:
-
- >On 7 Sep 92 23:55:42 GMT Jake Blues said:
- >> Hello all. I remember reading that there was some dispute as to
- >>who invented the digital computer, and that a court case was ongoing that
- >>could have wide-reaching consequences to the industry. Does anyone have
- >>any more info on that? Has the court case been resolved? Who won?
-
- >Seriously, I've always considered the Jacquard Loom the first digital
- >computer, but someone can perhaps find an earlier example. The earliest
- >"electronic brain" I know of was the ENIAC project in 1946 which was an
- >example of your tax dollars at work. I believe that technology was an
- >is available to almost anyone.
-
- The British Collossus computer built by Turing in 1943 was before
- ENIAC, but it is now fairly widely accepted that the first
- *electronic* digital computer was developed by J.V. Atanasoff and C.E.
- Berry at Iowa University in 1939-1942. (mechanical adders and
- multipliers are far older and electro-mechanical devices were already
- in use at that time).
-
- It used binary arithmetic, dynamic memory (wheels of capacitors that
- were refreshed on every revolution), binary punched cards for
- temporary storage and decimal punched cards for input/output. It was
- not programmable as such, being constructed to solve linear equation
- systems. Due to the unreliability of the card system (one error every
- 10^4-10^5 operations) it was unable to solve very large systems
- reliably, but by re-computation you could solve medium sized equation
- systems. The project was abandoned when the war started and both
- designers joined the army, but it influenced the design of ENIAC.
-
- Torben Mogensen (torbenm@diku.dk)
-
- P.S.
- The information above is from an article by Allan R. Mackintosh in
- Physics Toda, March 1987.
-
-