Sending text files . Sending binary items (such as a spreadsheet or graphics. Distributing electronic newsletters to a group of individuals. Broadcasting notices or updates to a group of individuals.

• 发送正文文件。发送二进制数据项（例 如电子表格或图形）散发电子时事通讯、传 单及杂志等。对某个群体的广播、通告或文件的修订版本。