Click to edit Master text styles
Second level
Third level
Fourth level
Fifth level
Ada Lovelace – born 1815 child of the poet Lord Byron and his wife, Annabella Milbanke
Lived with mother after parents separated. Taught mathematics.
1835 Married  William King, 1st Earl of Lovelace, acquired title: The Right Honourable Augusta Ada, Countess of Lovelace
1842-1843 translated notes on analytical engine
Note G:
"The Analytical Engine has no pretensions whatever to originate anything. It can do whatever we know how to order it to perform. It can follow analysis; but it has no power of anticipating any analytical relations or truths."
1890The 1880 US census had taken 7 years to complete since all processing had been done by hand from journal sheets. The increasing population suggested that by the 1890 census, data processing would take longer than the 10 years before the next census —so a competition was held to find a better method. It was won by a Census Department employee, Herman Hollerith, who went on to found the Tabulating Machine Company, later to become IBM. He used Babbage's idea of using the punched cards from the textile industry for the data storage. His machines used mechanical relays (and solenoids) to increment mechanical counters. This method was used in the 1890 census and the completed result (62,622,250 people) released in just 6 weeks! This approach allowed much more in-depth analysis of the data and so, despite being more efficient, the 1890 census cost about double (actually 198%) that of the 1880 census. The inspiration for this invention was Hollerith's observation of railroad conductors during a trip in the western US; they encoded a crude description of the passenger (tall, bald, male) in the way they punched the ticket.
Picture from:
Alan Turing of Cambridge University, England, published a paper on "computable numbers" which reformulates Kurt Gödel's results (see related work by Alonzo Church). His paper addressed the famous 'Entscheidungsproblem' whose solution was sought in the paper by reasoning (as a mathematical device) about a simple and theoretical, computer known today as a Turing machine. In many ways, this device was more convenient than Gödel's arithmetics-based universal formal system.
Dec 1943: The Colossus was built, by Dr Thomas Flowers at The Post Office Research Laboratories in London, to crack the German Lorenz (SZ42) cipher. It contained 2400 vacuum tubes for logic and applied a programmable logical function to a stream of input characters, read from punched tape at a rate of 5000 characters a second. Colossus was used at Bletchley Park during World War II —as a successor to the unreliable Heath Robinson machines. Although 10 were eventually built, most were destroyed immediately after they had finished their work to maintain the secrecy of the work.
1949: "Computers in the future may weigh no more than 1.5 tons.", Popular Mechanics, forecasting the relentless march of science.
SSI circuits originally developed for US Minuteman missile programme.
Moore formulated his ‘law’ in an article for Electronics Magazine
Dubbed ‘law’ by Carver Mead, Caltech prof. in
Noyce, Grove & Moore founded Intel 1968
The complexity for minimum component costs has increased at a rate of roughly a factor of two per year ... Certainly over the short term this rate can be expected to continue, if not to increase. Over the longer term, the rate of increase is a bit more uncertain, although there is no reason to believe it will not remain nearly constant for at least 10 years. That means by 1975, the number of components per integrated circuit for minimum cost will be 65,000. I believe that such a large circuit can be built on a single wafer.
Figure from Intel web site