__ is an approach to I/O control in which I/O devices and main memory share the same address space. _ 是一种I/O控制方法，其中I/O设备和主存共享相同的地址空间
- Memory-mapped I/O - 内存映射I/O
Lineal spaces between the pits in a CD-ROM are called: CD-ROM上凹坑之间的线性空间称为
- lands. 平坦区
Superscalar computers are architectures that exhibit parallelism through _ and _.
- pipelining, replication