Download PDF by Michael Covington: Computer Science (Barron's Ez-101 Study Keys)

By Michael Covington

ISBN-10: 0812045866

ISBN-13: 9780812045864

Covers eighty key themes grouped into 12 issues, from working structures and information conversation to photographs and synthetic intelligence.

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Put simply, hypertext is a means of having blocks of text interconnected, so that we can move - at will- from one piece of text to another. Thus, we might be looking at a piece of legislation when a reference to another piece of legislation appears in the body of the first - if these two pieces were held in a hypertext system, then we move to the second at the click of a mouse button, and back to the first with another. e. moving and displaying text according to predefined links. As an example of the power of instantly accessing references, we can look at 'Shepardizing'.

We shall also look at image and sound. Also important are basic mechanics of information retrieval- that is, how we can search through large amounts of text to find the small sections of material which we want to display. First, a brief introduction to how the computer handles characters - the basic element of text. ASCII charaders A byte is one basic element of computer information. It can have one of 256 possible values. 3 These 256 values can be utilised to represent the printable characters needed in text.

The search engines have to either be told which www sites they are to index, or automatically scan as many sites as they can, indexing without the specific agreement of the site owner. The difference between the documents contained on these two different types of search engine are therefore related to the editorial function - either there is human intervention 38 The Computerised Lawyer (in which case some general organising system such as a subject classification can be applied) or there is only automatic indexing which will index everything.

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Computer Science (Barron's Ez-101 Study Keys) by Michael Covington


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