"I will try to express myself in some mode of life or art as freely as I can and as wholly as I can, using for my defense the only arms I allow myself to use -- silence, exile, and cunning." -- James Joyce
One complaint: when the mouse hovers over the "chapter details" sections, there isn't an indication that it's a "clickable" object. I mean, HOW are the computer's transfer links supposed to be readied under these conditions?
I understand that operating systems are divided into "kernel mode" and "user mode" when they are running and this seems to be connected to "processor modes", but can this split exist without hardware support?
You should include some stuff about the boot process. Under security, you might want to add hash/signature checks like in dm-verity, OS X code signing, and Windows' executable/driver verification.