a) It's not on the desktop, it's on the laptop b) CISC machines are just RISC machines with an extra layer of decoding c) Bringing your CPU design in house mean

a) It's not on the desktop, it's on the laptop b) CISC machines are just RISC machines with an extra layer of decoding c) Bringing your CPU design in house means it can interface better with your hardware and software d) cost