扩展名主要有：
1. 蘓" "H.323 Internet 电话技术"
2. 虒" "虚拟设备驱动程序"
3. "ACA" "Microsoft Agent Character File (HTTP format)"
4. "ACF" "Microsoft Agent Character File (HTTP format)"
5. "ACG" "Microsoft Agent 预览文件"
6. "ACL" "自动更正列表文件"
7. "ACS" "Microsoft Agent Character File"
