The seperate folders inside System are interesting to me too, it was more organized then they used in 7.0 when all files were in same suitcase system file.

http://shrani.si/f/5/FJ/4gWtwa22/picture-3.png

CL/1 >> This is what is said when clicked on the extension and preferences files

http://shrani.si/f/C/u7/1AVHRv5b/picture-1.png

http://shrani.si/f/1c/9a/1I6GUvuU/picture-2.png

http://shrani.si/f/1B/a8/1d20DG1u/picture5.jpg

Click to expand...

Picture 5 caught my eye. Fonts are in a separate folder, apparently in System 7 alpha, but that feature did not ship until System 7.1. Also note Access Privileges as a separate item in the System Folder. Thanks.

[Edit] What is CL/1?

Click to expand...