The lecture is so short that I feel like I'm on a roll:)
This is what I understood in this lecture.
Head CPU to compute when command is received
I'm going to write it down for a while in case I forget it while I don't pay.
'Keynote' disks that should not be forgotten
The /Program / that I knew was an executable code that wrote a way to command each OS.
If you press it to work, the OS allocates memory and CPU and does something, which is /process/.