| | Mac OS 9 -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-22) |
 | | Mac OS 9 is the last version of what has since become known as the classic (additional info and facts about Mac OS) Mac OS, introduced by (additional info and facts about Apple Computer) Apple Computer on October 23, 1999. |
 | | Another update, Mac OS 9.2.1 was introduced in 2001, but only to improve the functioning of the Classic environment in the new (additional info and facts about Mac OS X) Mac OS X (and was followed by 9.2.2 with the same purpose). |
 | | Mac OS X provides a compatibility layer called (A creation of the highest excellence) Classic that runs a complete Mac OS 9 installation within OS X, for applications and hardware that expect to be running under OS 9. |
| www.absoluteastronomy.com /encyclopedia/m/ma/mac_os_91.htm (308 words) |