COMPUTER SYSTEM ARCHITECTURE
As we know all computer systems perform the functions of inputting, storing, processing, controlling, and outputting. Now we'll get acquainted with the computer system units that per-form these functions. But to begin with let's examine computer systems from the perspective of the system designer, or archi¬tect.
It should be noted that computers and their accessory equip¬ment are designed by a computer system architect, who usually has a strong engineering background. As contrasted with the analyst, who uses a computer to solve specific problems, the computer system architect usually designs computer that can be used for many different applications in many different business. For example, the product lines of major computer manufactur¬ers such as IBM, Digital Equipment Corporation and many others are the result of the efforts of teams of computer system architects.
Unless you are studying engineering, you don't need to be¬come a computer system architect. However, it is important that as a potential user, applications programmer or systems analyst you understand the functions of the major units of a computer system and how they work together.
Types of computers
The two basic types of computers are analog and digital. Analog computers simulate physical systems. They operate on the basis of an analogy to the process that is being studied. For example, a voltage may be used to represent other physical quan¬tities such as speed, temperature, or pressure. The response of an analog computer is based upon the measurement of signals that vary continuously with time. Hence, analog computers are used in applications that require continuous measurement and control.
Digital computers, as contrasted with analog computers, deal with discrete rather than continuous quantities. They count rather than measure. They use numbers instead of analogous physical quantities to simulate on-going, or real-time processes. Because they are discrete events, commercial transactions are in a natural form for digital computation. This is one reason that digital computers are so widely used in business data processing.
Machines that combine both analog and digital capabilities are called hybrid computers. Many business, scientific, and in¬dustrial computer applications rely on the combination of ana¬log and digital devices. The use of combination analog devices will co ntinue to increase with the growth in applications of mi¬croprocessors and microcomputers. An example of this growth is the trend toward installing control systems in household ap¬pliances such as microwave ovens and sewing machines. In the future we will have complete indoor climate control systems and robots to do our housecleaning. Analog sensors will provide in¬puts to the control centres of these systems, which will be small digital computers.
Просмотрите текст еще раз. ответьте на вопросы, используя информацию текста.
1. Who designs computers and their accessory equipment? 2. What is the role of an analyst? 3. Is it necessary for a user to become a computer system architect? 4. What functions do computer systems perform? 5. What types of computers do you know? 6. What is the principle of operation of analog comput¬ers? 7. How do digital computers differ from analog comput¬ers? 8. Where are digital and analog computers used? 9. What are hybrid computers? 10. Where do they find application?
Найдите в тексте английские эквиваленты следующих словосочетаний:
Функции ввода, хранения, обработки, управления и вывода информации; познакомиться; системные блоки; для начала; вс устройства; разработчик ком¬пьютерной системы; хорошая компьютерная подготовка; различные сферы применения; корпорация цифрового оборудования; прикладной программист; системный раз¬работчик; главные устройства компьютерной системы; моделировать физические величины; измерение сигналов; в отличие от; иметь дело скорее с дискретными, чем не¬прерывными величинами; в режиме реального времени;
Listen! Anna sings in the next room. She sings very well. She is studying at the Conservatory for 3 years. 2. What are you writing? - I'm writing a letter to his sister. We often write letters to each other. She is now working on his book. She's working on it for several months. 3. What are you doing now? - I'm preparing for a seminar on the history and gosu¬darstva law. - In my opinion, you are preparing for a long time. - Yes, this workshop is very difficult. I'm getting ready for several hours. - But you're usually quick to cook. - Yes, but for this workshop, I am preparing to three hours.
The main objective of business communication is productive cooperation. The most important thing is to know how to communicate. Communication is necessary not only to present its point of view orally or in writing, but also to perceive other people's opinions. Just can not forget about the appearance, because it creates the first impression. For example, for an interview, you don't come in shorts, shirt and sneakers, because the employer will understand that you don't know the basics of business communication. If your life involves important work and especially work with people, you should wear classic outfits: white shirt, black skirt, and shoes.
Ignorance of such important factors in business communication can lead to awkward situations. I advise you to study some aspects of business communication.