信息技术的普及,互联网络的广泛使用,对于实现信息共享、提高工作效率、节约能源等有着非常重要的意义.如今,在我们的生活中,不仅有供全球信息共享的因特网,一些重要的政府部门,大的企业公司还花费资金设立了区域网.这些区域网不仅方便了本系统内部各种信息的交流,有效地提高了工作效率,其开设的公用电子信函窗口在及时接收、发送电子信函方面也极大地方便了与外界的信息交流. The popularization of information technology and the extensive use of the Internet are very important for sharing information, improving work efficiency, saving energy, etc. Nowadays, in our life, there are not only the Internet for global information sharing, some important governments Departments and large enterprise companies have also set up regional networks for spending money which not only facilitate the exchange of various kinds of information within the system but also effectively improve the work efficiency. The public electronic letter windows provided by the department receive and send electronic letters Aspects also greatly facilitate the exchange of information with the outside world.