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The Universal Coded Character Set (UCS, Unicode) is a standard set of characters defined by the international standard ISO/IEC 10646, Information technology — Universal Coded Character Set (UCS) (plus amendments to that standard), which is the basis of many character encodings, improving as characters from previously unrepresented writing systems are added.
UTF-16 arose from an earlier obsolete fixed-width 16-bit encoding now known as UCS-2 (for 2-byte Universal Character Set), [2] [3] once it became clear that more than 2 16 (65,536) code points were needed, [4] including most emoji and important CJK characters such as for personal and place names.
Microsoft was one of the first companies to implement Unicode in their products. Windows NT was the first operating system that used "wide characters" in system calls.Using the (now obsolete) UCS-2 encoding scheme at first, it was upgraded to the variable-width encoding UTF-16 starting with Windows 2000, allowing a representation of additional planes with surrogate pairs.
In that case, the whole message gets reencoded using the UCS-2 encoding, and the maximum length of the message sent in a single SMS is immediately reduced to 70 characters, instead of 160. Others vary based on the choice and configuration of SMS application, and the length of the message [ citation needed ] .
The Unicode Consortium and the ISO/IEC JTC 1/SC 2/WG 2 jointly collaborate on the list of the characters in the Universal Coded Character Set.The Universal Coded Character Set, most commonly called the Universal Character Set (abbr. UCS, official designation: ISO/IEC 10646), is an international standard to map characters, discrete symbols used in natural language, mathematics, music, and other ...
In Unicode and the UCS, a compatibility character is a character that is encoded solely to maintain round-trip convertibility with other, often older, standards. [1] As the Unicode Glossary says: A character that would not have been encoded except for compatibility and round-trip convertibility with other standards [2]
In computing, a code page is a character encoding and as such it is a specific association of a set of printable characters and control characters with unique numbers. Typically each number represents the binary value in a single byte. (In some contexts these terms are used more precisely; see Character encoding § Terminology.)
Everson, Michael (1999-01-29), Revised proposal for encoding the Old Permic script in the UCS: L2/12-025: N4177: Everson, Michael (2012-01-24), Proposal for encoding the Old Permic script in the SMP of the UCS: L2/12-137: N4263: Everson, Michael (2012-04-26), Revised proposal for encoding the Old Permic script in the SMP of the UCS: L2/12-112