Many thanks to Prof. Mathy for the following article on changes in computer technology. Nowadays, schools use technology all the time and very soon we hope to be video conferencing with schools in Canda and elsewhere. It is a very different world even from ten years ago. The use of interactive whiteboards in classrooms is now routine and it is not at all unusual to travel the world via the web in a single morning. More on this anon...in the meantime, over to a true expert.
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If you look at a computer that’s a few years old, and at a brand new one in the shop, they both look like big metal boxes. However, on the inside, some very big changes have happened.
The main part of the computer is called the processor. The processor mostly contains a clever piece of electronics called the core. This can do all sorts of maths operations. And it can do these operations very fast too. When you see an advertisement telling you that a processor operates at 2GHz, it is a rather complicated way of saying that the processor can do 2 billion maths operations per second. You’d soon be done with your maths homework if you could go that fast, wouldn’t you?
The processor and the core inside it are a little bit like your head with your brain inside. Or at least, that’s the way it was for old computers, because for new computers things are different. You see, engineers have been inventing more and more clever ways to build processor cores, and because of that, the size of these cores has become smaller and smaller. They are about as big as one of your fingernails. So as computer brains are taking up less space, not so long ago, someone had the bright idea to put two cores instead of one inside the processor. All of a sudden, the processor was like one head with two brains. At the supermarket, that would be called a “buy one get one free bargain”, but in the world of computers, such a beastie is called a “dual-core processor”- but now you know this simply means that the computer can do 2 maths operations at the same time.
People say “the more the merrier”, don’t they? So engineers decided to put more and more cores inside the processor, filling the computer’s head with more and more brains. Today, you can find computers with 8 brains. In fact, you may already have one in your house: the PlayStation 3 has got 8 brains inside it.
In a few years, processors with 32, 68, or even 128 cores (that’s a head with a lot of brains) will be quite common and with each of these brains being capable of doing several billions of maths calculations every second, that’s an awful lot of maths! Processors with more than two cores are called “multi-core processors”.
So new computers have more brains than old ones, and that is why old computers seem very sluggish compared to old ones.
Oh, and be thankful that children are not like computers, because your younger brother or sister would have more brains than you have…Wicked!