Until now, there have appeared more than 40 famous P2P systems, which deal with resource sharing, cooperate computing, instant message and system security.

到目前为止，于P2P相关的著名系统已经超过40个，涉及到了资源共享，协同计算，及时短信服务，系统安全等方面；

youdao

Until now, there have appeared more than 40 famous P2P systems, which deal with resource sharing, cooperate computing, instant message and system security.

到目前为止，于P2P相关的著名系统已经超过40个，涉及到了资源共享，协同计算，及时短信服务，系统安全等方面；

youdao