search.noResults

search.searching

dataCollection.invalidEmail
note.createNoteMessage

search.noResults

search.searching

orderForm.title

orderForm.productCode
orderForm.description
orderForm.quantity
orderForm.itemPrice
orderForm.price
orderForm.totalPrice
orderForm.deliveryDetails.billingAddress
orderForm.deliveryDetails.deliveryAddress
orderForm.noItems
TRANSCRIPTS


LEILA: Well, the technician explained that components get faster or cheaper over time, or have more storage capacity. So we put speed and storage size on the same scale because we felt they were equally important. Isn’t that correct Majed?


MAJED: Absolutely. There are other factors which are important too, but we felt that speed and capacity were the most important.


Extract 7


MAJED: The technician explained that, at first, hard disks were a specialized form of storage, so they were very expensive. Later disks were cheaper, even though they had less capacity to begin with.


JACK: Sorry, I don’t follow. Could you possibly explain why that’s important?


MAJED: Well, basically the cost of the product often depends on how many of them are being made at the time.


Extract 8


EVIE: I don’t understand why the size of a hard drive should get smaller. Everything else gets faster or bigger.


LEILA: Well, as Majed explained, they were specialized. Those drives were used for the IBM 3340 and the number of drives manufactured was so small that they didn’t have to worry so much about cost. Later, when cost became more important, it was cheaper to make drives with less capacity to begin with.


Extract 9


MAJED: Yes, especially when computer companies began to make smaller computers, for example PCs.


JACK: If I understand you correctly, you’re saying that to begin with, the new desktop computers were much less powerful than the older computers.


MAJED: Yes, that’s right.


Extract 10 LECTURER: This is all very interesting, isn’t it?


EVIE: Yes, but if we just go back to the graph, we can see that apart from one fall in hard drive capacity, each of the components gets faster and larger.


LEILA: Correct!


Extract 11 MAJED: I’m not sure that’s true. I think there may


have been other falls which are not represented on the graph because the data is not detailed enough …


LEILA: I don’t think I agree with that. In my opinion there is enough data on the graph to support our conclusion.


Unit 7, Lesson 2, Exercise B≤1.28


Part 1 Good morning, everyone. What I’m going to talk about today is a key aspect of what makes computing possible – that is, the production of the software which makes computers work. In other words, how is the production of code managed? There are many different stages in the development of software, beginning with defining the problem. This includes requirements analysis, agreeing design specifications and system design. Of course, this can also involve building working prototypes for the client. The next stage is actually producing the software. This involves choosing a model for development, allocating resources such as programmers and computing facilities, and controlling the quality of what is produced. The final stage is documenting the program and troubleshooting any problems with it. Managing this whole process is also known as ‘project management’. What I mean is ... it covers everything relating to how the software is actually produced by programmers, and it can affect everything from what tools are used, how long the production takes, to the quality of the software. Anyway, we will look at project management later on.


So, er … in later lectures, we’ll also go on to consider how developers approach the issue of balancing the costs of software and hardware when designing systems. Today, however, we will deal with general software production processes and methods.


Unit 7, Lesson 2, Exercise C≤1.29


Part 2 As we have seen in earlier sessions, the computing process can be thought of as the input of data to the system, its processing by the computer hardware and its output. As we know, the speed or rate of processing is largely determined by the processor and memory available. Now, another term for the processor and memory is system resources, and a well-written piece of software makes the best possible use of the system


123


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84  |  Page 85  |  Page 86  |  Page 87  |  Page 88  |  Page 89  |  Page 90  |  Page 91  |  Page 92  |  Page 93  |  Page 94  |  Page 95  |  Page 96  |  Page 97  |  Page 98  |  Page 99  |  Page 100  |  Page 101  |  Page 102  |  Page 103  |  Page 104  |  Page 105  |  Page 106  |  Page 107  |  Page 108  |  Page 109  |  Page 110  |  Page 111  |  Page 112  |  Page 113  |  Page 114  |  Page 115  |  Page 116  |  Page 117  |  Page 118  |  Page 119  |  Page 120  |  Page 121  |  Page 122  |  Page 123  |  Page 124  |  Page 125  |  Page 126  |  Page 127  |  Page 128  |  Page 129  |  Page 130  |  Page 131  |  Page 132  |  Page 133  |  Page 134  |  Page 135  |  Page 136  |  Page 137  |  Page 138  |  Page 139  |  Page 140