as ECMA-6 based on work the ECMA's Technical Committee TC1 had carried out since December 1960. 1972: ISO 646 (ISO 7-bit character-encoding standard, using the same alphabetic code values as ASCII, revised in second edition ISO 646:1983 and third edition ISO/IEC 646:1991 as a joint ISO/IEC standard) 1983: ITU-T Rec. T.51 | ISO/IEC 6937 (a multi-byte extension of ASCII) 1987: ISO/IEC 8859-1:1987 (8-bit character encoding) Subsequently, other versions and parts of ISO/IEC 8859 have been published. Mid-to-late 1980s: Windows-1250, Windows-1252, and other encodings used in Microsoft Windows (some roughly similar to ISO/IEC 8859-1) 1990: Unicode 1.0 (developed by the Unicode Consortium), contained in the block "C0 Controls and Basic Latin" using the same alphabetic code values as ASCII and ISO/IEC 646 Subsequently, other versions of Unicode have been published and it later became a joint ISO/IEC standard as well, as identified below. 1993: ISO/IEC 10646-1:1993, ISO/IEC standard for characters in Unicode 1.1 Subsequently, other versions of ISO/IEC 10646-1 and one of ISO/IEC 10646-2 have been published. Since 2003, the standards have been published under the name "ISO/IEC 10646" without the separation into two parts. 1997: Windows Glyph List 4 Representation In ASCII the letters belong to the printable characters and in Unicode since version 1.0 they belong to the block "C0 Controls and Basic Latin". In both cases, as well as in ISO/IEC 646, ISO/IEC 8859 and ISO/IEC 10646 they are occupying the positions in hexadecimal notation 41 to 5A for uppercase and 61 to 7A for lowercase. Not case sensitive, all letters have code words in the ICAO spelling alphabet and can be represented with Morse code. Usage All of the lowercase letters are used in the International Phonetic Alphabet (IPA). In X-SAMPA and SAMPA these letters have the same sound value as in IPA. Alphabets containing the same set of letters The list below only includes alphabets that lack: letters whose diacritical marks make them distinct letters. multigraphs that constitute distinct letters. ligatures that are distinct letters Notable omissions due to these rules include Spanish, Esperanto, Filipino and German. The German alphabet is sometimes considered by tradition to contain only 26 letters (with ä, ö, ü considered variants and ß considered a ligature), but the current German orthographic rules include ä, ö, ü, ß in the alphabet placed after Z; however, this order is normally not used in collation: usually ä, ö, ü are collated as a, o,