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1) "Z3" -- As to z3 roadster
- This article is about the Z3 pioneering computer from 1941. For the BMW automobile, see BMW Z3.
Konrad Zuse's Z3 was the first working programmable, fully automatic machine, whose attributes, with the addition of conditional branching, have often been the ones used as criteria in defining a computer. The Z3 was built with 2,000 relays, had a clock frequency of ~5–10 Hz, and a word length of 22 bits.[1] Calculations on the computer were performed in full binary floating point arithmetic. The machine was completed in 1941 (on May 12 that year, it was successfully presented to an audience of scientists in Berlin). The original Z3 was destroyed in 1944 during an Allied bombardment of Berlin. A fully functioning replica was built in the 1960s by the originator's company Zuse KG and is on permanent display in the Deutsches Museum. In 1998 the Z3 was proven to be Turing-complete. - 1 How the Z3 relates to other work
- 2 Relation to the concept of a universal Turing machine
- 3 See also
- 4 Notes and references
- 5 External links
| Unlike the first non-programmable computer built by Wilhelm Schickard in 1623, the Z3 of 1941 was program-controlled. The success of Zuse's Z3 is often attributed to its use of the simple binary system. This was invented roughly three centuries earlier by Gottfried Leibniz; Boole later used it to develop his Boolean algebra. In 1937, Claude Shannon of MIT introduced the idea of mapping Boolean algebra onto electronic relays in a seminal work on digital circuit design (see also Z1). Nevertheless, Zuse (who did not know Shannon's work) was the one who put the ideas together and made it work on the program-controlled Z3. The first design of a program-controlled computer was due to Charles Babbage in the mid 1800s. This design, however, could not be realized back then, presumably because it was decimal..."
2) "Roadster" -- As to z3 roadster road·ster
Pronunciation: 'rOd-st&r
Function: noun
1 a : a horse suitable for riding or driving on roads b : a utility saddle horse of the hackney type
2 a : a light carriage : BUGGY b : an automobile with an open body that seats two and has a folding fabric top and often a luggage compartment or rumble seat in the rear Pronunciation Symbols
1950 Jaguar XK120 roadster Roadster is the North American term for a 2-seater without a permanent top and without rollup windows (if it has rollup windows it is a cabriolet, not a roadster), and the windshield is bolt on rather than integrated as in modern cars. Even with the lightweight convertible top raised and the clear plastic "windows" snapped in, the driver and passenger remain somewhat exposed to the elements. "Convertible" is an abbreviation of "convertible coupe" or "convertible sedan" which in 1920s-30s parlance indicated that the car had roll-up side windows instead of removable windows (usually called sidecurtains in America). In modern times, the word is often used to describe a two-seat convertible without fixed window frames, especially a light-weight sports car. Most modern day production "roadsters" only meet one of the three criteria. Here, the use of the name roadster is more a marketing gimmick than a technical label, invoking the feeling of an open-top machine for enjoyment, like those of the past. - 1 Old roadsters
- 2 Hot Rod Roadsters
- 3 Modern roadsters
- 4 See also
- 5 Roadster Pedal Toys
- 6 References
| Traditionally, roadster bodies were used on anything from a Ford Model T to a Cadillac V-16. It was a body style favored by those who preferred enjoyment to practicality. Roadster-bodied cars are popular with collectors, and are often valued higher than even other open styles. The American Hot rod is largely based on Ford roadsters and coupes. Late Model T Fords, and 1932 Fords are by far the most popular starting points. The roadster name experienced a resurgence in 1990 with the introduction of the Mazda Miata/MX-5. Though not roadsters in the traditional open sense, many manufacturers today offer "roadsters". They can be described as "convertible sports cars" because they stress driving rather than practicality - like sports cars, mo..."
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