4、dream () doing sth

258、It is mainly of magnetic surface memory, optical disk memory and solid-state hard disk.

257、Registers can be into special registers and general registers.

256、CUP is the core of the hardware, for data processing, and can complete various arithmetic, logical operations and control functions.

255、single-user

254、operation code

253、natural language

252、machine language

251、software engineering

250、stack pointer

249、local optimal