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Teleprinters used Baudot, a five-bit code developed in 1870 that includes only capital letters without diacritics. In the 1960s, Baudot was replaced by ASCII, a seven-bit code that includes both upper and lower cased letters. IBM introduced Extended ASCII, an eight-bit encoding standard, with the original PC in 1981. This set includes 37 characters with diacritics. Latin-1, a slightly revised version of the IBM character set, was adopted as an international standard in 1987.<ref>[http://www.unicode.org/charts/PDF/U0080.pdf Controls and Latin-1 Supplement], Unicode, Inc.</ref>
Teleprinters used Baudot, a five-bit code developed in 1870 that includes only capital letters without diacritics. In the 1960s, Baudot was replaced by ASCII, a seven-bit code that includes both upper and lower cased letters. IBM introduced Extended ASCII, an eight-bit encoding standard, with the original PC in 1981. This set includes 37 characters with diacritics. Latin-1, a slightly revised version of the IBM character set, was adopted as an international standard in 1987.<ref>[http://www.unicode.org/charts/PDF/U0080.pdf Controls and Latin-1 Supplement], Unicode, Inc.</ref>
Unicode, implemented by the Windows operating system since 2000, includes Latin-1 as well as a comprehensive collection of Nordic, Eastern European, and even Asian characters. Unicode characters can be up to four bytes long. This allows for over 1.1 million characters to be encoded, although only 112,000 codepoints have been assigned so far.
Unicode, implemented by the Windows operating system since 2000, includes Latin-1 as well as a comprehensive collection of Nordic, Eastern European, and even Asian characters. Unicode characters can be up to four bytes long. This allows for over 1.1 million characters to be encoded, although only 113,000 codepoints have been assigned so far.<ref>Cunningham, Andrew, "[http://arstechnica.com/gadgets/2014/06/unicode-7-0-introduces-2834-new-characters-including-250-emoji/ Unicode 7.0 introduces 2,834 new characters, including 250 emoji]", ars technica, June 17 2014</ref>
===Latin-1===
===Latin-1===