翻译；What does PCI?
A local bus developed by Intel, PIC is designed to perform a couple of different functions. On the desktop, it serves as a processor-independent bridge between the CPU and high-speed I/O, especially video. In servers, its high-performance characteristics provide a tremendous advantage by solving what would otherwise be an intractable architectural problem: relieving the bottlenecks among storage peripherals ,memory, and the network. The motivations for developing such a high-speed bus are well known. Workgroup tasks that require a lot of bus-throughput-such as high-speed networking, handling targe video files, and running multimedia and other I/O-intensive applications__are rapidly becoming the rule, not the exception. And the rate of change in processors and peripherals is so fast that IS managers need PCI's ability to give I/O subsystems the "headroom" they need to handle increasingly higher speeds.
PCI的功能
PCI是一种由Intel公司开发的本地结构总线，在设计时考虑了两种功能：在台式机上，作为一个与处理器无关的连接CPU和高速I/O口__尤其是视频通道__的总线；在服务器中，其卓越的性能正好解决了其它总线结构所难以处理的一个瓶颈问题，即外围存贮设备、内存和网络间的通信。开发这种高速总线的推动力是众所周知的。需要很大的总线流量的工作组任务__诸如高速网络工作、大型视频文件处理、多媒体以及其它需要大量I/O操作的应用__将迅速成为常规作业，而并非偶尔为之。处理器和外设的变化是如此之快，以致于信息系统(IS)管理器需要PCI给I/O子系统一种“上层空间”来应付快速增长的信息传递速度。