Some first computer models

Other large technology companies such as Hewlett-Packard HPTexas Instruments TIand Data General had entered it, and some large IBM customers were buying Apples, [5] [6] [7] so the company saw introducing its own personal computer as both an experiment in a new market and a defense against rivals, large and small. Rumors abound about personal computers to come from giants such as Digital Equipment Corporation and the General Electric Company. But there is no contest. When the number eight company in the Fortune enters the field, that is news

Some first computer models

That same year in Germany, engineer Konrad Zuse built his Z2 computer, also using telephone company relays.

Their first product, the HP A Audio Oscillator, rapidly became a popular piece of test equipment for engineers. Stibitz stunned the group by performing calculations remotely on the CNC located in New York City using a Teletype terminal connected via to New York over special telephone lines.

This is likely the first example of remote access computing. Konrad Zuse finishes the Z3 Computer The Zuse Z3 Computer The Z3, an early computer built by German engineer Konrad Zuse working in complete isolation from developments elsewhere, uses 2, relays, performs floating point binary arithmetic, and has a bit word length.

Some first computer models

The Z3 was used for aerodynamic calculations but was destroyed in a bombing raid on Berlin in late Zuse later supervised a reconstruction of the Z3 in the s, which is currently on display at the Deutsches Museum in Munich. Hundreds of allied bombes were built in order to determine the daily rotor start positions of Enigma cipher machines, which in turn allowed the Allies to decrypt German messages.

The basic idea for bombes came from Polish code-breaker Some first computer models Rejewski's "Bomba. The machine was designed and built by Atanasoff and graduate student Clifford Berry between and The legal result was a landmark: Atanasoff was declared the originator of several basic computer ideas, but the computer as a concept was declared un-patentable and thus freely open to all.

The replica is currently on display at the Computer History Museum. Bell Labs Relay Interpolator is completed George Stibitz circa The US Army asked Bell Laboratories to design a machine to assist in testing its M-9 gun director, a type of analog computer that aims large guns to their targets.

Mathematician George Stibitz recommends using a relay-based calculator for the project. The Relay Interpolator used relays, and since it was programmable by paper tape, was used for other applications following the war. The team first builds a large analog computer, but found it inaccurate and inflexible.

After designers saw a demonstration of the ENIAC computer, they decided instead on a digital approach, while at the same time the project changed from a flight simulator to an air defense system.

A total of ten Colossi were delivered, each using as many as 2, vacuum tubes. A series of pulleys transported continuous rolls of punched paper tape containing possible solutions to a particular code. Colossus reduced the time to break Lorenz messages from weeks to hours.

Most historians believe that the use of Colossus machines significantly shortened the war by providing evidence of enemy intentions and beliefs.

The Mark 1 produced mathematical tables but was soon superseded by electronic stored-program computers. John von Neumann writes First Draft of a Report on the EDVAC John von Neumann In a widely circulated paper, mathematician John von Neumann outlines the architecture of a stored-program computer, including electronic storage of programming information and data -- which eliminates the need for more clumsy methods of programming such as plugboards, punched cards and paper.

Hungarian-born von Neumann demonstrated prodigious expertise in hydrodynamics, ballistics, meteorology, game theory, statistics, and the use of mechanical devices for computation. Because of its electronic, as opposed to electromechanical, technology, it is over 1, times faster than any previous computer.

ENIAC used panel-to-panel wiring and switches for programming, occupied more than 1, square feet, used about 18, vacuum tubes and weighed 30 tons.

It was believed that ENIAC had done more calculation over the ten years it was in operation than all of humanity had until that time. The first program, consisting of seventeen instructions and written by Kilburn, ran on June 21st, This was the first program to ever run on an electronic stored-program computer.

These were later confirmed by using more modern computers for the actual flights.

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It was transferred to the Department of Physics at the University of Melbourne in and remained in service until some first computer models 1. Babbage's Analytical Engine In , an English inventor and mathematician Charles Babbage was commissioned by the British government to devel┬Čop a system for calculating the rise and fall of the tides.

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Some standard types of video controller ICs were popular, but see the very detailed List of home computers by video hardware for a discussion of video capabilities of different models. Memory and TV bandwidth restrictions meant that typical home computers had only a few color choices and perhaps 20 lines of 40 characters of text as an upper.

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Computers | Timeline of Computer History | Computer History Museum