随着我国信息技术的迅猛发展,计算机越来越广泛地被应用于人类社会活动的方方面面,产生的电子文件也越来越多。电子文件是指能被计算机系统识别处理,按一定格式存储在磁带、磁盘或光盘等介质上,并可在网络上传输数字代码序列。由于电子文件的传输快捷性、可复制性等优点,使得无纸化办公成为现 With the rapid development of information technology in our country, computers are increasingly used in all aspects of human social activities and more and more electronic documents are produced. Electronic files are those that can be recognized by a computer system and stored on media such as tape, disk or optical disk in a format that can be used to transmit digital code sequences over the network. Due to the fast transfer of electronic documents, reproducibility, etc., making paperless office becomes