说明：  当今时代是飞速发展的信息时代。在各行各业中离不开信息处理，计算机被广泛应用于B/S系统环境。计算机的好处在于它能够进行信息管理。使用计算机进行信息控制，不仅提高了工作效率，而且大大的提高了安全性。
(Today' s time are the rapid development of the information age. In all walks of life can not deal with information, computers are widely used in B/S system environment. The benefits of the computer is that it can carry out information management. Control the use of computer information, not only enhance the work efficiency, but also greatly enhance the security.)