Since the fact that English language has became the elementary language of/for the Computer Technology and as the usage of Personal Computers is worldwide now, it became apparent that there is a need for adaptation of the data processing on computers, especially for Users from different language zone. A Convention had to be adopted to replace letters with numbers. Although one byte is sufficient for the representation of 256 characters, at the beginning it seems too much. One of the character set is ASCII (American Standard Code for Information Interchange). This set employs a 7-bit character code. ASCII set is adequate for displaying the information in English language, but not adequate enough to display the majority of the world’s languages, because most of the other languages contain the so-called special characters. Therefore, it is necessary to expand the character of the set, so it can be suitable for all languages, providing the exchange of information between computer systems and interfaces. The further development lead us to ISO-8859, a character set of 8-bit, Windows ANSI and, at the end, to UNICODE, a character set of 16-bit. According to rules, the ASCII characters appear as subset of the major other character sets. UNICODE represents the most important extension of the ASCII character set. UNICODE character
set supports almost all spoken languages, as well as mathematics’ and other symbols. The support of the
UNICODE standards, for all subjects, represents the most important step in the internationalization of the
Internet.