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Computer Science (Part 2).doc
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V. Open the brackets using the verbs in the correct forms (Past Simple - Past Continuous - Active or Passive).

1. Scientists (to design) this portable computer many years ago. 2. What you (to do) at 3 yesterday? – I (to chat) with my friends via the Internet. 3. Barcode scanners (to design) to read barcodes on the products sold in shops some years ago. 4. Why that photograph (to laugh) at? 5. The hackers (to steal) a lot of money from his credit card a week ago. 6. When the computer mouse (to invent)? 7. Who the computer mouse (to invent) by? 8. Who (to invent) the computer mouse? 9. When we (to come) home, John (to surf) the net. 10. Our files (to restore) a week ago. 11. Who (to develop) the concept of microelectronics? 12. Who the concept of microelectronics (to develop) by? 13. The ordinary computer mouse (to follow) by an optical one. 14. MS-DOS (to develop) by Microsoft in 1981 for all IBM PC compatibles

Text 2. The Graphical User Interface.

The term user interface refers to the standard procedures that the user follows in order to interact with a computer. In the late 1970s and early 80s, the way users accessed computer systems was very complex. They had to memorize and type a lot of commands just to see the contents of a disk, to copy files or to respond to a single prompt. In fact, it was only experts who used computers, so there was no need for a user-friendly interface.

In 1984 Apple produced the Macintosh, the first computer with a mouse and a graphical user interface (GUI). Macs were designed with one clear aim: to facilitate interaction with the computer. A few years later, Microsoft launched Windows, another operating system based on graphics and intuitive tools. Nowadays, computers are used by all kinds of people, and as a result there is a growing emphasis on accessibility and user-friendly systems.

A good user interface is important because when you buy a program you want to use it easily. Moreover, a graphical user interface saves a lot of time: you don’t need to memorize commands in order to execute an application; you only have to point and click so that its content appears on the screen.

A GUI makes use of a WIMP environment: windows, icons, menus and pointer. The background of the screen is called the desktop which contains labeled pictures called icons. These icons represent files or folders. Double-clicking a folder opens a window which contains programs, documents, or more nested folders. When you are in a folder, you can launch a program or document by double-clicking the icon, or you can drag it to another location. When you run a program, your PC opens a window that lets you work with different tools. All the programs have a high level of consistency, with similar toolbars, menu bars, buttons and dialog boxes. A modern OS also provides access to networks and allows multitasking , which means you can run several programs – and do various tasks – at the same time.

Today the most innovative operating systems are the Macintosh, Microsoft Windows (the most recent version is Windows Vista), Unix, Linux, Windows Mobile (used on most PDAs and smartphones), Palm OS (used on Palm handheld devices), RIM (used on Blackberry communication devices. Developed by Research in Motion), the Symbian OS (used by some phone makers including Nokia and Siemens). These computer platforms differ in areas such as device installation, network connectivity or compatibility with application software.

Study the following words and expressions:

  1. in order to – для того, чтобы

  2. to memorize - запоминать

  3. user-friendly – удобный для пользователя

  4. to facilitate – способствовать, облегчать

  5. to execute – выполнять

  6. intuitive [in'tјu:itiv] – удобный в использовании, интуитивно- понятный

  7. labeled – маркированный, помеченный; с ярлыком

  1. to launch – выпускать, запускать (приложение)

  2. nested – уплотненный, вложенный, родственный

  3. application – приложение, прикладная программа; применение

  4. consistency – последовательность, логичность

  5. feature – черта, параметр, характеристика

  6. compatible - совместимый

  7. compatibility – совместимость

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