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2.3 The computer in the world

I want to stress what, for me, is the main point. Computers exist because of our human need to reach out into the world. The computer is a tool which, like all tools, strengthens our ability to reach into, and grapple with, the world. This course explores:

  • the ways in which computers help us make contact with the world;

  • the many purposes we can achieve once a computer has been used to capture some part of the world.


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7.3.2 Subtraction

As I indicated at the start of this section, subtraction is converted to addition by replacing the number to be subtracted by its additive inverse, which in the case of binary arithmetic is its 2's complement. An example should make this clear.

Example 9

Subtract the signe
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References

Revell, P. (September, 2004) Miniature computers are adding up to fun [online] http://education.guardian.co.uk/elearning [story[0,10577,1314016,00.html Accessed 16 October 2006] Guardian Newspapers Ltd.

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17.3 The network

The network conveys the data on items purchased through to the database server. It also conveys data such as revised prices and special offers from the database server back to the checkout terminal. In both cases this may involve selecting an appropriate route through the network and manipulating, storing or retrieving data.


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13.2 Magnetic storage

As I mentioned earlier, your computer has a hard disk which provides a permanent storage area for your computer's programs and the files you create. When you save files to your computer's hard disk, you are using a magnetic storage medium. Data stored in magnetic form can be changed once it has been stored, so if you run out of space you can delete some files to make room or, if you want to edit a file, you can make the necessary changes and then save it again. At the time of writing, a mediu
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7 Describing an ICT system: conclusion

We have arrived at a model of a communication system that illustrates the processes needed for communication. We have also looked at the different kinds of communication link that can be used to convey data, and how to express the rates at which they can convey data. In sections 8–14, we shall be looking at a computer system as an example of an ICT system where data manipulation and storage are the most important features.


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Leadership and context
This free course, Leadership and context, introduces you to the potential impact of context and culture, both internal and external, on educational organisations and its implications for leadership. First published on Fri, 26 May 2017 as Leadership and context. To
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Talk the talk
This free course introduces the mechanics of effective, persuasive oral presentations, by giving you the opportunity to analyse examples and then create your own. Using resources such as TED Talk videos, you will see how experts deliver professional talks and famous speeches, observe what works, and identify how language connects ideas and keeps a listener engaged. First published o
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Introduction

This OpenLearn course is an adapted extract from the Open University course L120 Ouverture: intermediate French.

This OpenLearn course provides a sample of level 1 study in French.


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Listening to young children: supporting transition
In this free course, Listening to young children: supporting transition, you will explore ways of listening to children in order to support their experiences of changes or transitions. Such transitions can involve many dimensions, including familiarisation with new cultural practices, the development of new relationships and potentially a shift in identity, for example, from being a 'nursery child' to being a 'pupil'. During the course you will explore how listening to children as they go throug
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Being an OU student
In the course, you’ll get a flavour of what OU study is actually like, learn about how you’ll be supported, the technologies you’ll use and start to develop the skills you’ll need to succeed. First published on Wed, 08 Aug 2018 as Being an OU student. To
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Advanced Spanish: Arts and crafts
This free course, Advanced Spanish: Arts and crafts, is designed to develop your knowledge and understanding of Spanish-speaking societies and cultures and extend the practical skills of listening, speaking, reading and writing. You will examine the world of Spanish and Latin-American art and explore the difference between art and craft. First published on Tue, 16
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Intermediate Spanish: Understanding spoken Spanish
Welcome to this free course, Intermediate Spanish: Understanding spoken Spanish, which is aimed at intermediate learners of Spanish with an interest in language and culture. The six-hour course is designed to develop your understanding of spoken Spanish through six video portraits of people living in Spain. It introduces you to naturally spoken language, and gives clear advice on how to use authentic video resources as a useful and enjoyable learning tool. Through completing various activities y
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4.2.4 Plan your time

When planning to use the time available, you should:

  • make sure that you are answering the right number of questions

  • divide your time according to the weighting of the questions

  • write down the finishing time for each question

  • try to allow for 10 minutes checking time at the end.

Stick to your plan. Evidence indicates that two half-answered questions obtain more marks than one completed
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4.2.3 Choose the questions and order them

During your first read through the paper, put an asterisk or star sign (*) in pencil against the questions you think you could possibly answer. Then read through your starred questions and put an additional star against the ones that you prefer. Choose the questions with the highest star rating.


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3.11.1 Answering multiple-choice questions

Multiple-choice questions usually involve you in selecting the right answer from several possible responses. The questions are frequently short, and your answer requires no writing. However, finding the right answer may require you to do calculations on paper or, in some cases, check back through an extract of material very closely to see which is the correct of two possible answers. In the Sciences Good Study Guide there is a good example on pages 265–68, which shows the series of c
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3.8.2 Analysing and answering essay-based exam questions

For the following activity, you can use questions from a specimen paper, past papers or even questions you have devised for yourself.

Activity 9

Exam questions for essay-based courses often contain 'process words'. T
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