Apple releases chart of Mac OS X versions included with Mac models

MacTech Magazine reported today that Apple, Inc. released two key charts
for administrators. These two charts show which Mac OS versions are
included with different models of Macs shipped since 1998. The charts
include not only the Mac model and introduction date, but also the original
OS version shipped, and any later ones that may have been shipped during
that models shipping life.

Mac OS: Versions, builds included with Intel-based Macs

Mac OS: Versions, builds included with PowerPC Macs (since 1998)

Apple goes onto explain about not installing older versions of the Mac OS
than what came with the computer.