过去10年,计算机硬件得到了迅速发展。这种发展遍及整个计算机领域,从小的台式个人计算机直到最大的大型计算机。在此期间,最有意义的发展标志之一,是计算机能力增大而其费用降低,即性能价格比增高。再就是在线系统的开发,优于以每日每月为基础的批程序,特别是在主计算机上。 Over the past 10 years, computer hardware has been rapidly developed. This development has spread throughout the computer world, from small desktop personal computers to the largest mainframe computers. During this period, one of the most significant signs of development was the increase in the capacity of computers and the reduction of their cost, that is, the increase in cost performance. Then there is the development of an online system that outperforms the batch process based on a daily, monthly basis, especially on the host computer.