Sources:

• The Early Mac OS, from Andy F. Mesa: http://applemuseum.bott.org/sections/os.html
• HISTORY OF APPLE MACINTOSH OPERATING SYSTEM,
  from JC Trotot: http://perso.club-internet.fr/jctrotot/Perso/History.html
• history_systemversion.TXT, Apple
• system compatibility chart.TXT, Apple
• systemversion_macversion.TXT, Apple
• Le site de Fabrice Montupet, http://perso.wanadoo.fr/fabrice.montupet
• Apple History: www.apple-history.com ou http://www.histoire-apple.com/
• http://webpages.charter.net/geoffwiley/html/machistory.html
• RedFoxCenter : http://www.redfoxcenter.org/MacOS/
• http://webrhapso.free.fr/index.shtml

Et d'autres, qui me pardonnerons -j'espère- et se signalerons à mon attention:

Apple, Macintosh, Mac OS, the Apple Logo, and any pictures illustrated are registered trademarks of Apple Computer, Inc.