Analysis of information sources in references of the Wikipedia article "XNU" in English language version.
Finally, this is worth repeating: please keep in mind that you do not need to run the 64-bit kernel in order to run 64-bit applications or install more than 4 GB of RAM in your Mac. Applications run just fine in 64-bit mode on top of the 32-bit kernel, and even in earlier versions of Mac OS X it's been possible to install and take advantage of much more than 4GB of RAM.
I/O Kit uses a restricted subset of C++
I/O Kit uses a restricted subset of C++