ISO/IEC 8859-7:2003, Information technology — 8-bit single-byte coded graphic character sets — Part 7: Latin/Greek alphabet, is part of the ISO/IEC 8859 series of ASCII-based standard character encodings, first edition published in 1987.
The table in this article shows the updated 2003 version which adds three characters (0xA4: euro sign U+20AC, 0xA5: drachma sign U+20AF, 0xAA: Greek ypogegrammeni U+037A).
[9][10]) ISO-8859-7 is the IANA preferred charset name for this standard (formally the 1987 version, but in practice there is no problem using it for the current version, as the changes are pure additions to previously unassigned codes) when supplemented with the C0 and C1 control codes from ISO/IEC 6429.
Unicode is preferred for Greek in modern applications, especially as UTF-8 encoding on the Internet.
Unicode provides many more glyphs for complete coverage, see Greek alphabet in Unicode and Ancient Greek Musical Notation for tables.