This article introduces various international standards for CD ROM. In the meantime,it analyses the reading & writing speed of CD ROM drivers as examples of 12X and 16X drivers. Moreover,it puts forward the advice for customers when choosing CD ROM.

• 介绍了作为多媒体计算机重要部分CD?ROM的各种国际标准，同时以12X驱动器和16X驱动器为例对CD?ROM驱动器的读写速度进行了分析，并对用户选购CD?ROM提出了要注意的事项