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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 ...
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]
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.
IBM uses code page 1258 (CCSID 1258 and euro sign extended CCSID 5354) for Windows-1258. [1] [2] [3] UTF-8 is the preferred encoding for Vietnamese in modern applications. Windows-1258 may not always round-trip Unicode encoded Vietnamese due to changes caused by Unicode normalization. [4]
The Vietnamese Web browser Cốc Cốc comes with an input method built-in. Input methods allow words to be composed in a more flexible order than keyboard layouts allow. For example, to enter the word "viết" using the TCVN 6064:1995 keyboard layout, one must type V I 3 8 T, in that order.
VPSKeys is a freeware input method editor developed and distributed by the Vietnamese Professionals Society (VPS). One of the first input method editors for Vietnamese, it allows users to add accent marks to Vietnamese text on computers running Microsoft Windows. The first version of VPSKeys, supporting Windows 3.1, was released in 1993.
A typical OEM code page, in its second half, does not resemble any ANSI/Windows code page even roughly. Nevertheless, two single-byte, fixed-width code pages (874 for Thai and 1258 for Vietnamese ) and four multibyte CJK code pages ( 932 , 936 , 949 , 950 ) are used as both OEM and ANSI code pages.
[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.