Appendix A Unicode

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Appendix A 　　Unicode

// 附錄A 　　 統一字元編碼標準

(unicode /?ju?n??k??d/   n.a character set for all languages  統一字元編碼標準.   )

 

Computers  use numbers. They store characters by assigning a number for each other. The original coding system was called ASCII (Amnerican Standard code for Inforamtion Interchange) and had 127 numbers (0 to 127) each stored as a 7-bit number. ASCII could satisfactorily handle lowercase and uppercase letters, digits, punctuation characters, and some control characters. An attempt was made to extended the ASCII character set to 8 bits. The new code, which was called Extended ASCII, was never internationally standardized. 

　　To overcome the difficulties inherent in ASCII and Extended ASCII, the Unicode Consortium (a group of multilingual software manufacturers) created a universal encoding system to provide a comprehensive character set called Unicode. 

　　Unicode was originally a 2-byte character set. Unicode version 3, however, is a 4-byte code and is fully compatibles with ASCII and Extended ASCII. The ASCII set, which is now called Basic Latin, is Unicode with the upper 25 bit set to zero. Extended ASCII, which is now called Latin-1, is Unicode with the 24 upper bits set to zero. Figure A .1  shows how the different systems are compatible. 

//     電腦使用數字 .他們儲存字元通過彼此賦予一個數字. 最開始的編碼系統被叫做ASCII(美國標準資訊交換代碼), 每個被儲存的有127位,作為一個數字.  ASCII 令人滿意地處理大寫與小寫字母, 數字、標點符號字元。 嘗試將ASCII字元擴充為8位。 新的代碼，被叫做擴充ASCII, 從來沒有被國際標準化。 

　　為了克服在ASCII和擴充ASCII內有的困難，統一字元編碼標準聯盟（一個關於多種語言軟體開發商的組織）建立了一個通用的編碼系統，提供了一個可以理解的字元集叫做統一字元編碼標準。

　　統一字元編碼標準原先是2個位元組的字元集。統一字元編碼標準版本3，無論如何，是一個4位元組的編碼， 並且充分相容了 ASCII和擴充ASCII。 

　　( assign /?‘sa?n/   vt.  If you assign a particular function or value to someone or something, you said they have it. 賦予(某功能或價值) ; 

　　   satisfactorily /,s?t?s‘f?kt?r?l? /  adv.  令人滿意的;

　　   punctuation /p??(k)t??‘e??(?)n/     n. the marks  used to divide a piece of writing into sentence, phrases etc. 標點符號， 

　　   inherent / ?n‘h??r(?)nt  /   adj.  a qualilty that is inherent in something is a natural part of it and cannot be separated from it.  固有的，內在的，與生俱來的。

　　   consortium /k?n‘s??t??m /   n.  A consortium is a group people or firms who have agreed to cooperate with each other.  聯盟；

　　   multilingual /  m?lt?‘l??gw(?)l /   adj. multilingual means involving several different languages .  多種語言的；

　　    manufacturer // ,m?nj?‘f?kt?(?)r?(r)/  n. a company that makes large quantities of goods. 製造商、製造公司、製造廠；

 

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Appendix A Unicode