Z3
The third computer designed and built by {Konrad
Zuse } and the first {digital computer } to successfully run
real programs . The computer was ready in 1941 , five years
before {ENIAC }.
Zuse began his work on program -driven calculating machines in
1935 . His two predessors of the Z3 , the Z1 and Z2 , were
unsuccessful mechanical calculating machines . The Z3 was
delivered to the Deutsche Versuchsanstalt f ür Luftfahrt
German Experimental Department of Aeronautics ) in Berlin and
was used for deciphering coded messages . A 1960
reconstruction of the Z3 is in the Deutsche Museum in Munich .
The Z3 used about 2600 relays of the kind used in
telecommunications . Zuse wrote and implemented the language
Plankalk ül } on the Z3 . Programs were punched into cinefilm .
Zuse built some more computers after World War II , including
the Z3 's successor , the Z4 , which was set up at ETH Zurich ,
Switzerland .
Of the potential rival claimants to the title of first
programmable computer , {Babbage } (UK , c1840 ) planned but was
not able to build a {decimal }, programmable machine .
Atanasoff }'s {ABC }, completed in 1942 was a special purpose
calculator , like those of {Pascal } (1640 ) and {Leibniz }
1670 ). Eckert and Mauchly 's {ENIAC } (US ), as originally
released in 1946 , was programmable only by manual rewiring or ,
in 1948 , with switches . None of these machines was freely
programmable . Neither was {Turing } et al .'s {Colossus } (UK ,
1943 -45 ). {Aiken }'s {MARK I } (1944 ) was programmable but
still decimal , without separation of storage and control .
Features ? Where was it designed ? Contemporaries ?]
http ://cs .tu -berlin .de /~zuse )}.
http ://epemag .com /zuse )}.
2003 -10 -01 )
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