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5. Translate sentences into English using words and word combinations from the Vocabulary Notes.

1) Цифрові і аналогові комп’ютери мають свої характерні особливості. Ми зрозуміли різницю між ними, прочитавши текст. 2) Також існують такі комп’ютери, які поєднують риси аналогового і цифрового комп’ютерів. Однак найпоширеніші – це цифрові комп’ютери. 3) Персональні комп’ютери – це машини, які використовуються для індивідуальної роботи людей дома чи на роботі. 4) Вмонтовані комп’ютери не існують окремо. Їх вміщують у різне приладдя. 5) Комп’ютери можна класифікувати і за розміром. 6) Найпотужніший комп’ютер – це універсальна обчислювальна машина.

Grammar in Use

The Past Continuous Tense

  1. Open the brackets using the Past Continuous Tense.

1) The programmer (to write) a program at that moment yesterday. 2) The computer (to work) the whole day yesterday. 3) From 6 till 7 the PC (to compile) the program. 4) When I came he (to write) a new program. 5) When we needed the fast calculations the mainframe (to terminate) the computation. 6) We (to collect) the data the whole day yesterday. 7) The students (to perform) some specialized tasks more easily.

2. Put the sentences of exercise 1 into negative form.

3. Put the questions to the sentences of exercise 1.

4. Change the following into the Past Continuous Tense.

1) An alternative voltage source applied to the circuit. 2) A direct current flows through a circuit in one direction. 3) Digital computers receive new programs quite easily. 4) Transistors found wide application in computers, automatic devices, communication, and aviation. 5) Electronic devices helped people discover new phenomena of nature. 6) They calculated the trajectories of spaceships. 7) Jack Kilby developed the concept of integrating device and built the first IC in 1958.

Additional Text

(for individual work)

Read and translate the text.

The First Computers

In 1930 the first analog computer was built by American named Vannevar Bush. This device was used in World War II to help aim guns.

Many technical developments of electronic digital computers took place in the 1940s and 1950s. Mark I, the name given to the first digital computer, was completed in 1944. The man responsible for this invention was Professor Howard Aiken. This was the first machine that could figure out long lists of mathematical problems at a very fast rate.

In 1946 two engineers at the University of Pennsilvania, J.Eckert and J.Maushly, built their digital computer with vacuum tubes. They named their new invention ENIAC (the Electronic Numerical Integrator and Calculator).

Another important achievement in developing computers came in 1947, when John von Neumann developed the idea of keeping instructions for the computer inside the computer's memory. The contribution of John von Neumann was particularly significant. As contrasted with Babbage's analytical engine, which was designed to store only data, von Neumann's machine, called the Electronic Discrete Variable Computer, or EDVAC, was able to store both data and instructions. He also contributed to the idea of storing data and instructions in a binary code that uses only ones and zeros. This simplified computer design. Thus computers use two conditions, high voltage, and low voltage, to translate the symbols by which we commu­nicate into unique combinations of electrical pulses. We refer these combinations as codes.

Neumann's stored program computer as well as other ma­chines of that time were made possible by the invention of the vacuum tube that could control and amplify electronic signals. Early computers, using vacuum tubes, could perform computations in thousandths of seconds, called milliseconds, instead of seconds required by mechanical devices.