Unit 4 Hardware and software In order to use computers effectively to solve problems in our environment, computer systems are devised.. The first part is hardware – the physical, electr
Trang 1Unit 4 Hardware and software
In order to use computers effectively to solve problems in our environment, computer systems are devised A “system” implies a good mixture of integrated parts working together
to form a useful whole Computer systems may be discussed in two parts
The first part is hardware – the physical, electronic, and electromechanical devices that are thought of and recognized as "“computers"” The second part is software – the programs that control and coordinate the activities of the computer hardware and that direct the processing
of data
Input
Secondary storage
Figure 7.1 Hardware components of a basic computer system
Figure 7.1 show diagrammatically the basic components of computer hardware joined together in a computer system The centerpiece is called either the computer, the processor,
or usually the central processing unit (CPU) The term “computer” usually refers to those
parts of the hardware in which calculations and other data manipulations are performed, and
to the internal memory in which data and instructions are stored during the actual execution
of programs The various peripherals, which include input and/or output devices, various secondary memory devices, and so on, are attached to the CPU
Computer software can be divided into two very broad categories – system software and
applications software The former is often simply referred to as “systems” These, when brought into internal memory, direct the computer to perform tasks The later may be
provided along with the hardware by a systems supplier as part of a computer product designed to answer a specific need in certain areas These complete hardware/software products are called turnkey system
The success or failure of any computer system depends on the skill with which the hardware and software components are selected and blended A poorly chosen system can be a
monstrosity incapable of performing the tasks for which it was originally acquired
Words and expressions
hardware
software
application software
turnkey system
processor
Trang 2Exercises
I Main idea
Which statement best expresses the main idea of the text? Why did you eliminate the other choices?
1 Only hardware is necessary to make up a computer system
2 Software alone doesn’t constitute a computer system
3 A computer system needs both hardware and software to be complete
II Understanding the passage
Indicate whether the following ideas are stated or not stated (S?NS) in the text
1 A system implies a good mixture of parts working together
2 Input and output devices operate more slowly than the decision-making devices
3 The control unit and the arithmetic-logical unit are part of the processor
4 The “computer” is the hardware
5 Software is the programs on cards, tapes and disks
6 The processor is usually referred to as the CPU
7 The word “computer” means the processor and the internal memory
8 Systems software is usually referred to as programs
9 Complete hardware/software products are called turnkey systems
10 Computers process specially prepared items of information
III Locating information
Find the passage in the text where the following ideas are expressed
1 the hardware consists of the physical devices of the computer
2 In order to solve problems, an appropriate computer system must be developed
3 The “computer” is the CPU and the internal memory
4 The success of failure of a computer system depends on the proper mixture of hardware and software
5 There are two parts to a computer system
6 Computer software can be divided into two parts
7 The software is the programs
8 The peripheral devices are attached to the CPU
IV Contextual reference
Look back at the text and find out what the words on bold typeface refer to
1 two parts
2 that
3 that
4 that
5 in which
6 in which
7 the former
8 these
9 the latter
10 it
V Understanding words
Refer back to the text and find synonyms for the following words
Trang 3Now refer back to the text and find antonyms for the following words
VI Word forms
choose the appropriate form of the words to complete the sentences
1 integration, integrate, integrated, integrating
a Some computer manufacturers have both input and output devices into one
terminal
b The success of any computer system depends on the of all its parts to form a
useful whole
c input and output devices into peripheral has reduced the area needed for a
computer installation
2 coordination, coordinate, coordinated, coordinating, coordinator
a The control unit of a processor the flow of information between the arithmetic
unit and the memory
b the many activities in a computer department is the job of the department head
c The of a language institute has assistant to help him and may have access to a
computer to help him with the of the many programs, timetables, space and
students results
3 diagram, diagrammatic, diagrammatically, diagrammed
a Very often manufacturers provide representations of the internal workings of a
computer
b A is a drawing that shows how something is arranged rather than what it
actually looks like
c A few ideas have been for you in this book
4 interchange, interchangeable, interchangeably, interchanged
a The word “arithmetic logic” and “arithmetic-logical” can be used
b There is often an of ideas among computer scientists
c There is a big difference between an input and an output These cannot be
5 division, divide, divisible
a It is often difficult for computer science students to their time up proportionally
between studying and programming
b Are all numbers by three?
c There is always a of labor within a computer company
VII Content Review
1 match the words in column A with the words or statements in column B
A B
1 hardware
2 software
3 processor
4 peripherals
5 systems software
6 applications software
a the computer
b input/output and secondary memory devices
c short for central processing unit
d physical electronic and electromagnetic devices
e hardware plus software
f hardware/software packages
Trang 47 turnkey systems
8 CPU
g used for a specific job
h the programs
2 Use the following diagram which shows the relationship between the system and its parts
to complete the paragraph
Computer system
Central processing
unit Peripheral devices Systems software Applications
software
Input/ Output Secondary
memory
A computer system consists of two components: _and _ Each component is subdivided into different parts The Central Processing Unit and the _ constitute the- _ component Systems software andthe- _ comprise thethe- _ component Devices that are used for secondary storage are considered part of the _ component These devices along with Input and Output devices are referred to as _ devices