URLs (Uniform Resources Locators) mentioned in the article "Transcription and Transliteration of Greek."
http://www.tlg.uci.edu/~tlg/TLG_Info.html gives a modest history of the Thesaurus Linguae Graecae.
http://www.tlg.uci.edu/~tlg/BetaCode.html gives a listing of the main correspondences of the classical Greek writing system and the Ascii code. In addition there is a reference to find a full and complete listing of all correspondence.
http://www.ecma.ch/stand/ECMA-043.htm gives instructions on how to acquire the pamphlet, 8-bit Coded Character Set Structure and Rules, 3rd. ed. (Geneva 1991), published by the European Computer Manufacturers Association (ECMA), which establishes the rules for 8bit coded character sets, that is, codes that contain 256 characters. There is information as well on other ISO codes.
http://czyborra.com/charsets/iso8859.html provides a visual listing of the various letters represented by ISO codes 8859, 1 through 10.
http://www.perseus.tufts.edu/Help/fonthelp.html gives a list of free available fonts for viewing classical Greek.
http://www.perseus.tufts.edu gives access to Perseus on the Internet.
http://www.hri.org allows a number of different styles (e.g., serif and sans serif) of ISO 8859-7 to be downloaded.
http://alcyone.cc.uch.gr/~kosmas/Helen/index.html gives information on Project Helen which gives, among other things, a good account with examples of the dire need for a standard transliteration system for Greek into Roman letters.
http://www.unicode.org/unicode/standard/standard.html has innformation on The Unicode Standard: Version 2.1.