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VSCII (Vietnamese Standard Code for Information Interchange), also known as TCVN 5712, [2] ISO-IR-180, [3].VN, [4] ABC [4] or simply the TCVN encodings, [4] [5] is a set of three closely related Vietnamese national standard character encodings for using the Vietnamese language with computers, developed by the TCVN Technical Committee on Information Technology (TCVN/TC1) and first adopted in ...
Windows-1258 is a code page used in Microsoft Windows to represent Vietnamese texts. It makes use of combining diacritical marks.. Windows-1258 is compatible with neither the Vietnamese standard (TCVN 5712 / VSCII), nor the various other encodings in use in practice (VISCII, VNI, VPS).
The majority of code pages in current use are supersets of ASCII, a 7-bit code representing 128 control codes and printable characters. In the distant past, 8-bit implementations of the ASCII code set the top bit to zero or used it as a parity bit in network data transmissions. When the top bit was made available for representing character data ...
The successful inclusion of composed and precomposed Vietnamese in Unicode 1.0 was the result of the lessons learned from the development of 8-bit VISCII and 7-bit VIQR. [ 2 ] The next year, in 1993, Vietnam adopted TCVN 5712 , its first national standard in the information technology domain. [ 3 ]
[1] [2] It's by far mostly used for Russian, while a small minority of Russian websites use it, with 94.6% of Russian (.ru) websites using UTF-8, [3] [4] [5] and the legacy 8-bit encoding is distant second. In Linux, the encoding is known as cp1251. [6] IBM uses code page 1251 (CCSID 1251 and euro sign extended CCSID 5347) for Windows-1251.
Eventually, as 8-, 16-, and 32-bit (and later 64-bit) computers began to replace 12-, 18-, and 36-bit computers as the norm, it became common to use an 8-bit byte to store each character in memory, providing an opportunity for extended, 8-bit relatives of ASCII. In most cases these developed as true extensions of ASCII, leaving the original ...
UTF-8: code points map to a sequence of one, two, three or four code units. UTF-16: code units are twice as long as 8-bit code units. Therefore, any code point with a scalar value less than U+10000 is encoded with a single code unit. Code points with a value U+10000 or higher require two code units each.
UTF-16 uniquely encodes all Unicode characters in the Basic Multilingual Plane (BMP) using 16 bits but the remaining Unicode (e.g. emojis) is encoded with a 32-bit (four byte) code – while the rest of the industry (Unix-like systems and the web), and now Microsoft chose UTF-8 (which uses one byte for the 7-bit ASCII character set, two or ...