TortoiseSVN 是 Subversion 版本控制系统的一个免费开源客户端，可以超越时间的管理文件和目录。文件保存在中央版本库，除了能记住文件和目录的每次修改以外，版本库非常像普通的文件服务器。你可以将文件恢复到过去的版本，并且可以通过检查历史知道数据做了哪些修改，谁做的修改。这就是为什么许多人将 Subversion 和版本控制系统看作一种“时间机器”。-TortoiseSVN is a free open source Subversion client version control system, can transcend time management files and directories. Save the file in a central repository, but each can remember file and directory modifications, the repository is like an ordinary file server. You can restore a file to the last version, and can be checked by historical data do know what changes, who made the change. This is why many people will Subversion and version control system as a "time machine".