- •Передмова
- •Module I
- •II. Reading
- •Lutsk National Technical University
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences:
- •4. Answer the questions:
- •5. Find as quickly as possible and read out the sentences containing the following important information:
- •Word Study
- •1. Give Ukrainian equivalents of the following.
- •2. Give English equivalents of the following.
- •3. Match each word in the left-hand column with the best in the right-hand column.
- •4. Fill in the gaps with the words from Vocabulary Notes in the appropriate form.
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •Grammar in Use The Present Simple Tense
- •1. Put the following into the singular.
- •2. Put the verbs in brackets in the Present Simple..
- •2. Put sentences of ex.1 into negative and interrogative form.
- •Vocabulary Notes
- •Comprehension
- •1. Complete the following statements:
- •2. Answer the following questions:
- •3. Do the following tasks:
- •Text 2. My Future Speciality is Computer Systems and Networks
- •Vocabulary Notes
- •Comprehension
- •1. Complete the following statements:
- •2. Answer the following questions:
- •3. Do the following tasks:
- •Text 3. My Future Speciality is Professional Training
- •Vocabulary Notes
- •Comprehension
- •1. Complete the following statements:
- •2. Answer the following questions:
- •3. Do the following tasks:
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences:
- •4. Answer following questions.
- •5. Find as quickly as possible and read out the sentences containing the following important information:
- •Word Study
- •1. Give Ukrainian equivalents of the following.
- •2. Give English equivalents of the following.
- •3. Make up pairs or groups of words close in meaning.
- •4. Fill in the gaps with the words from Vocabulary Notes in the appropriate form.
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •Grammar in Use The Past Simple Tense
- •1. Put down the following sentences into the Past Simple Tense.
- •2. Open the brackets using the Past Simple Tense. Translate the sentences into Ukrainian.
- •3. Make up sentences using the following words. Don’t forget about word order in English.
- •Additional Text (for individual work) Read, translate the text and answer the following questions:
- •The Need for Computer Literacy in Modern Society
- •II. Reading Read, translate the text and point out the main characteristics of pc. Personal Computers
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences:
- •4. Answer following questions.
- •5. Find as quickly as possible and read out the sentences containing the following important information:
- •2. Make the sentences interrogative and negative.
- •3. Replace the Infinitive in brackets by the Future Simple Tense. Translate the sentences into Ukrainian.
- •Additional Text (for individual work) Read, translate the text and answer the following questions:
- •Application of Personal Computers
- •1. Find in the texts:
- •II. Reading Read, translate the text and mind the pc configuration. Pc Configuration
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences:
- •2. Make the sentences interrogative and negative.
- •3. Make up sentences using the following words. Translate the following definitions or explanations.
- •Additional Text (for individual work)
- •The Development of the Personal Computer
- •Module II
- •II. Reading
- •Computer Evolution
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences.
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •Grammar in Use
- •Additional Text (for individual work)
- •From the History of the Computers
- •1. Divide the text into the logical parts and give a title to each one.
- •II. Reading
- •Types of Computers
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences.
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •Grammar in Use
- •1. Divide the text into the logical parts and give a title to each one.
- •II. Reading
- •Three Basic Capabilities of a Computer
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences.
- •4. Answer the questions:
- •5. Find as quickly as possible and read out the sentences containing the following important information:
- •Word Study
- •1. Give Ukrainian equivalents of the following.
- •2. Give English equivalents of the following.
- •3. Match the words in a with their synonyms in b:
- •4. Fill in the gaps with the words from Vocabulary Notes in the appropriate form.
- •Instructions / to operate / storing / inputting / manipulating / outputting / input device / a cathode-ray-tube display / instantaneously
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •6. Read the text attentively, make the annotation of the text. To write annotation use clichés, given below.
- •Grammar in Use
- •1. Divide the text into the logical parts and give a title to each one.
- •II. Reading
- •Application of Computers
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences.
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •Grammar in Use Conjunctions
- •1. Translate the Complex sentences. Remember conjunctions (сполучники): that; so that; if whether; which; when; while; since; till; until; whatever; whenever; in order to; regardless of, etc.
- •2. Translate complex sentences:
- •Additional Text (for individual work)
- •Computers in Education
- •1. Divide the text into the logical parts and give a title to each one.
- •II. Reading
- •Basic Elements of a Computer
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences.
- •2. Give English equivalents of the following.
- •3. Match the words in a with their synonyms in b:
- •4. Fill in the gaps with the words from Vocabulary Notes in the appropriate form.
- •5 . Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •Grammar in Use
- •1. Put the Infinitive in brackets in the Present Perfect Tense.
- •2. Put these sentences into interrogative and negative form.
- •3. Replace the infinitive in brackets by the Present Perfect or the Past Indefinite.
- •Additional Text (for individual work)
- •The Computer System
- •1. Divide the text into the logical parts and give a title to each one.
- •II. Reading
- •Data Processing Systems
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Complete the sentences.
- •3. Choose the right answer:
- •4. Answer the questions to the text:
- •5. Find as quickly as possible and read out the sentences containing the following important information:
- •Word Study
- •1. Give Ukrainian equivalents of the following.
- •2. Give English equivalents of the following.
- •3. Match the words in a with their synonyms in b:
- •4. Fill in the gaps with the words from Vocabulary Notes in the appropriate form.
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes
- •3. Change from direct into indirect speech.
- •Additional Text (for individual work)
- •Information Explosion and Data Processing in Modern Society
- •II. Reading Read the text and be ready to answer the following questions:
- •Operating System
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2.Choose the right answer:
- •3. Complete the sentences.
- •4. Answer the questions to the text:
- •5. Find as quickly as possible and read out the sentences containing the following important information:
- •Word Study
- •1. Give Ukrainian equivalents of the following.
- •2. Give English equivalents of the following.
- •3. Match the words in a with their synonyms in b:
- •4. Fill in the gaps with the words from Vocabulary Notes in the appropriate form.
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes
- •Grammar in Use The Future Perfect Tense
- •1. Turn the following into the Future Perfect.
- •2. Replace the infinitive in brackets by the Future Indefinite or the Future Perfect.
- •3. Put questions to the underlined words.
- •Additional Text (for individual work)
- •Unix Operating System
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences.
- •4. Answer the questions to the text:
- •5. Find as quickly as possible and read out the sentences containing the following important information:
- •Word Study
- •1. Give Ukrainian equivalents of the following.
- •2. Give English equivalents of the following.
- •3. Match the words in a with their synonyms in b:
- •Additional Text (for individual work) Read, translate the text and be ready to answer the following questions:
- •Macintosh os
- •Module IV
- •II. Reading
- •The Structure of a Computer
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3.Complete the sentences:
- •Grammar in Use Types of Questions. Word Order.
- •1. Transform the following sentences into general questions introducing the necessary changes.
- •2. Put all types of questions to the following sentences.
- •Additional Text (for individual work)
- •1. Divide the text into the logical parts and give a title to each one.
- •II. Reading
- •The Structure of cpu
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences:
- •4. Answer the questions:
- •5. Find as quickly as possible and read out the sentences containing the following important information:
- •Word Study
- •1. Give Ukrainian equivalents of the following.
- •2. Give English equivalents of the following.
- •3. Match the words in a with their synonyms in b:
- •4. Fill in the gaps with the words from Vocabulary Notes in the appropriate form.
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •Grammar in Use The Passive Voice
- •1. Read and translate the following sentences paying attention to the predicates in the Passive Voice:
- •2. Fill in the gaps in the following sentences using the appropriate form of the verb in brackets.
- •3. Put the verbs in brackets in an appropriate tense form.
- •Additional Text (for individual work)
- •High Speed Register Storage
- •1. Divide the text into the logical parts and give a title to each one.
- •II. Reading
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences:
- •4. Answer the questions:
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •The Grammar in Use Modals
- •1. Translate the following sentences paying attention to the Modal Verbs and their equivalents.
- •2. Put the modal verbs into the:
- •3. Find sentences with modal verbs in the text Additional Text (for individual work)
- •"Cache" Memories
- •1. Divide the text into the logical parts and give a title to each one.
- •II. Reading
- •Input Devices
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences:
- •4. Answer the questions:
- •5. Find as quickly as possible and read out the sentences containing the following important information:
- •Word Study
- •1. Give Ukrainian equivalents of the following.
- •2. Give English equivalents of the following.
- •3. Match the words in a with their synonyms in b:
- •4. Fill in the gaps with the words from Vocabulary Notes in the appropriate form.
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •The Grammar in Use Modals
- •1. Translate the following sentences paying attention to the Modal Verbs and their equivalents.
- •2. Put the modal verbs into the:
- •3. Find sentences with modal verbs in the text Additional Text (for individual work)
- •"Seeking" for Tracks
- •1. Divide the text into the logical parts and give a title to each one.
- •II. Reading
- •Output Devices. Printer
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences:
- •4. Answer the questions:
- •5. Find as quickly as possible and read out the sentences containing the following important information:
- •Word Study
- •1. Give Ukrainian equivalents of the following.
- •2. Give English equivalents of the following.
- •3. Match the words in a with their synonyms in b:
- •4. Fill in the gaps with the words from Vocabulary Notes in the appropriate form.
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •The Grammar in Use Revision of the Module IV
- •1. Fill in the gaps in the following sentences using the appropriate form of the verb in brackets.
- •2. Choose the right form of the verb from the brackets. Mind the rule of the sequence of tenses.
- •3. Make the following interrogative and negative. Translate the following sentences.
- •Additional Text (for individual work)
- •Disks and Tapes
- •1. Divide the text into the logical parts and give a title to each one.
- •II. Reading
- •Computer Programming
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3.Complete the sentences:
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •The Grammar in Use The Infinitive
- •1. Translate the sentences and word-combinations, using Infinitive in the function of :
- •2. Analyze the forms of Infinitive and translate following sentences:
- •4. Translate sentences with Nominative with the Infinitive construction:
- •Additional Text (for individual work)
- •Character Data
- •1. Divide the text into the logical parts and give a title to each one.
- •II. Reading
- •Programs and Instructions
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences:
- •2. Give English equivalents of the following.
- •3. Match the words in a with their synonyms in b:
- •4. Fill in the gaps with the words from Vocabulary Notes in the appropriate form.
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •Grammar in Use The Participle
- •1. Translate the sentences containing Participle I and Participle II in the function of adverbial modifier:
- •2. Open the brackets using Perfect Participle Active or Perfect Participle Passive. Translate sentences into Ukrainian.
- •3. Translate sentences with Absolute Participle Complex:
- •Additional Text (for individual work)
- •Languages and Extensions
- •1. Divide the text into the logical parts and give a title to each one.
- •II. Reading
- •Running and Testing the Computer Program
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences:
- •4. Answer the questions:
- •5. Find as quickly as possible and read out the sentences containing the following important information:
- •Word Study
- •1. Give Ukrainian equivalents of the following.
- •2. Give English equivalents of the following.
- •3. Match the words in a with their synonyms in b:
- •4. Fill in the gaps with the words from Vocabulary Notes in the appropriate form.
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •Grammar in Use
- •1. Translate into Ukrainian, paying attention to Gerund
- •3. Translate into English using Gerund
- •1. Divide the text into the logical parts and give a title to each one.
- •II. Reading
- •Programming Languages
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences:
- •4. Answer the questions:
- •5. Find as quickly as possible and read out the sentences containing the following important information:
- •Word Study
- •1. Give Ukrainian equivalents of the following.
- •2. Give English equivalents of the following.
- •3. Match the words in a with their synonyms in b:
- •4. Fill in the gaps with the words from Vocabulary Notes in the appropriate form.
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •Grammar in Use Revision of the Module V
- •1. Analyze following non-finite forms of the verb and translate the sentences:
- •2. Open the brackets, using correct non-finite form of the verb.
- •3. Find non-finite forms of the verb in the sentences and name them:
- •Additional Text (for individual work)
- •Simula, smalltalk, and eiffel
- •1. Divide the text into the logical parts and give a title to each one.
- •II. Reading
- •Internet
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences:
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •6. Make up sentences from the following words and word-groups:
- •Grammar in Use Conditionals
- •1. Write down the following sentences using the II and III conditionals. Translate them.
- •2. Put the verbs in brackets into the correct form.
- •Additional Text (for individual work)
- •Communication and Media Technology
- •1. Divide the text into the logical parts and give a title to each one.
- •II. Reading
- •Understanding the World Wide Web
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences:
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •6. Make up sentences from the following words and word-groups:
- •Grammar in Use wish Sentences
- •1. Read the following sentences. What wishes would you make corresponding to the words in bold?
- •2. Complete the sentences with two to five words including the word in brackets.
- •3. Correct the mistakes
- •Additional Text (for individual work)
- •The Experience of the Web
- •1. Divide the text into the logical parts and give a title to each one.
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences:
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •6.Make up sentences from the following words and word-groups:
- •Grammar in Use Direct and Indirect Speech
- •1. Transform indirect commands changing direct speech into indirect one.
- •2. Transform sentences changing direct speech into indirect one.
- •Additional Text (for individual work)
- •World Wide Web
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences:
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •6. Make up sentences from the following words and word-groups:
- •Grammar in Use
- •Impersonal Sentences
- •1. Translate impersonal sentences. Pay attention to their structure.
- •Additional Text (for individual work)
- •Microsoft Internet Explorer
- •1. Divide the text into the logical parts and give a title to each one.
- •II. Reading
- •Automation
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences:
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •6. Make up sentences from the following words and word-groups:
- •Grammar in Use Noun
- •1. Make the following nouns plural.
- •2. Transform the following sentences into plural.
- •Additional Text (for individual work)
- •At an Automatic Plant
- •1. Divide the text into the logical parts and give a title to each one.
- •II. Reading
- •Automation and Mechanization
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences:
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •Grammar in Use
- •1. Divide the text into the logical parts and give a title to each one.
- •II. Reading
- •Automation and Labour
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences:
- •4. Answer the questions:
- •3. Match the words in a with their synonyms in b:
- •4. Fill in the gaps with the words from the box in the appropriate form.
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •Grammar in Use Conjunctions
- •1. Translate the following sentences paying attention to the meaning of the word “since ”:
- •2. State parts of speech the words in bold type belong to. Translate the sentences into Ukrainian taking into account different meanings of the word “provide”:
- •3. Complete the article. Use but, although or however.
- •Additional Text (for individual work)
- •Automated Production Lines
- •1. Divide the text into the logical parts and give a title to each one.
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences:
- •4. Answer the questions:
- •5. Find as quickly as possible and read out the sentences containing the following important information:
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •6. Make up sentences from the following words and word-groups:
- •Grammar in Use
- •4. Translate the following sentences and define the tense-forms which are used in the next sentences.
- •Additional Text (for individual work)
- •Types of Automation
- •1. Divide the text into the logical parts and give a title to each one.
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences:
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •6. Make up sentences from the following words and word-groups:
- •Grammar in Use Types of Sentences
- •1. Translate the following sentences paying attention to the meaning of
- •2. Analyse the type of subordinate clauses and translate the sentences into Ukrainian:
- •Additional Text (for individual work)
- •History and Definition of Robots
- •1. Divide the text into the logical parts and give a title to each one.
- •II. Reading
- •Classification of Robots
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Choose the right answer:
- •3. Complete the sentences:
- •4. Complete the sentences (a) choosing the required words or word combinations from list (b). Read and translate them.
- •5. Answer the questions:
- •6. Read the sentences from the text which illustrate the following statements:
- •5. Look through the text again. Describe the types of robots choosing the correct word. Complete the sentences if necessary.
- •6. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •7. Make up sentences from the following words and word-groups:
- •Grammar in Use Direct and Indirect Speech
- •1. Supply the correct form of the verb
- •2. Change direct speech into indirect
- •Additional Text (for individual work)
- •Man/Machine Interfaсe
- •1. Divide the text into the logical parts and give a title to each one.
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Complete the sentences:
- •3. Choose the right answer:
- •4. Answer the questions:
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •Grammar in Use
- •1. Fill in the gaps in the following sentences using the appropriate form of the verb in brackets.
- •2. Make up questions to which the underlined words are the answers:
- •3. Open the brackets using the appropriate form of the verb.
- •Additional Text (for individual work)
- •What can robots do?
- •1. Divide the text into the logical parts and give a title to each one.
- •II. Reading
- •The Technology within an Industrial Robot
- •Vocabulary Notes
- •Comprehension
- •1. Tell what sentences are true and what are false.
- •2. Complete the sentences:
- •3. Choose the right answer:
- •4. Answer the questions:
- •5. Find as quickly as possible and read out the sentences containing the following important information:
- •Word Study
- •1. Give Ukrainian equivalents of the following.
- •2. Give English equivalents of the following.
- •3. Match the words in a with their synonyms in b:
- •4. Fill in the gaps with the words from Vocabulary Notes in the appropriate form.
- •5. Translate sentences into English using words and word combinations from the Vocabulary Notes.
- •Grammar in Use
- •1. Read and translate the following sentences paying attention to the function of Participle in the sentences:
- •2. Make up questions to which the underlined words are the answers:
- •3. Open the brackets using Passive Voice
- •Additional Text (for individual work)
- •Definition of Robots
- •1. Divide the text into the logical parts and give a title to each one.
- •2. Put questions to the text.
- •3. Discuss it with your groupmates. English-Ukrainian Dictionary
- •Abbreviations
- •Glossary
- •Список л1тератури
- •Contents
- •1. Write down the following sentences using the II and III conditionals. Translate them. 182
- •43018 Луцьк, вул. Львівська, 75
II. Reading Read the text and be ready to answer the following questions:
What is an operating system?
How does it work?
What operating systems are there?
Operating System
An operating system is an important part of a computer system. A computer system is built from three general components: the hardware, the operating system, and the applications. The hardware includes pieces such as a central processing unit (CPU), a keyboard, a hard drive and a printer. You can think of these as the parts you are able to touch physically. Applications are why you use computers; they use the rest of the system to perform the desired task (for example, play a game, edit a memo, send electronic mail). The operating system is the component that on one side manages and controls the hardware and on the other manages the applications.
When you purchase a computer system, you must have at least hardware and an operating system. The hardware you purchase is able to use (or run) one or more different operating systems. You can purchase a computer package, which includes the hardware, the operating system, and possibly one or more applications. The operating system is necessary in order to manage the hardware and applications.
When you turn on your computer, the operating system performs a series of tasks, presented here in chronological order.
One of the first things you do, after successfully plugging together cables and components, is turn on your computer. The operating system takes care of all the starting functions that must occur to get your computer to a usable state. Various pieces of hardware need to be initialized. After the start-up procedure is complete, the operating system awaits further instructions. If you shut down the computer, the operating system also has a procedure that makes sure all the hardware is shut down correctly. Before turning your computer of again, you might want to do something useful, which means that one or more applications are executed.
After the operating system completes hardware initialization, you can execute an application. The executing application is called a process. It is the operating system’s job to manage execution of the application. When you execute a program, the operating system creates a new process. Many processes can exist simultaneously. This process is referred to as multitasking. When you exit your program (or it finishes executing) the process terminates, and the operating system manages the termination by reclaiming any resources that were being used. Most applications perform some tasks between the time the process is created and the time it terminates. To perform these tasks, the program makes requests to the operating system, and the operating system responds to the requests and allocates necessary resources to the program. When an executing process needs to use some hardware, the operating system provides access for the process.
To perform its task, a process may need to access hardware resources. The process may need to read or write a file, send data to a network card (to communicate with another computer), or send data to a printer. The operating system provides such services for the process. This is referred to as resource allocation. A piece of hardware is a resource, and the operating system allocates available resources to the different processes that are running.
All computers do not use the same operating systems. It is therefore important to assess the operating system used on a particular model before initial commitment because some software is only designed to run under the control of specific operating systems. Some operating systems are adopted as ’’industry standards’’ and these are the ones which should be evaluated because they normally have a good software base. The reason for this is that software houses are willing to expand resources on the development of application packages for machines functioning under the control of an operating system which is widely used. The cost of software is likely to be lower in such circumstances as the development costs are spread over a greater number of users, both actual and potential.
Mainframe computers usually process several application programs concurrently, switching from one to the other, for the purpose of increasing processing productivity. This is known as multiprogramming, which requires a powerful operating system. An operating system is stored on disk and has to be booted into the internal memory (RAM) where it must reside through processing so that commands are instantly available. The operating system commands may exceed the internal memory capacity of the computer in which case only that potion of the operating system which is frequently used is retained internally, other modules being read in from disk as required.