2_Computer Science Grade 10 Principles of textual programming Presentation 2 var

10.2.3.1 compare tables for character encoding such as Unicode and ASCII

ASCII and Unicode

https://www.youtube.com/watch?v=5aJKKgSEUnY

ASCII

Computers have to be able to represent letters and symbols as well as numbers. Simply, the idea is to give each character a number, as a code and store the codes and their meanings in a table.

A common code is ASCII - the American Standard Code for Information Interchange.

This uses seven bits to store characters. Seven bits is enough to code 128 different characters.

Using this information write a definition of ASCII in your exercise books. You do need to know what it stands for and how many bits it uses.

Activity 1

2 groups: ASCII & Unicode

https://en.wikibooks.org/wiki/A-level_Computing/AQA/Paper_2/Fundamentals_of_data_representation/ASCII_and_unicode
https://en.wikibooks.org/wiki/A-level_Computing/AQA/Problem_Solving,_Programming,_Data_Representation_and_Practical_Exercise/Fundamentals_of_Data_Representation/Unicode

How Unicode works

http://unicode.org/charts/

Present poster “difference between Unicode and ASCII” (3 group)

http://www.differencebetween.net/technology/software-technology/difference-between-unicode-and-ascii/

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