The presentation introduces the concept of character sets, which are collections of symbols used in communication. It explains that characters are assigned numeric codes, allowing computers to process and display text. The document then details different character sets, starting with ASCII, a 7-bit system primarily for English, and its 8-bit extension, Extended ASCII, which includes more characters for European languages. Finally, it presents Unicode as a comprehensive, multi-bit standard designed to support all global languages and characters, contrasting its advantages of broad multilingual support against the disadvantages of increased memory usage and complexity compared to ASCII.
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