original question: What is the protocol provider of the software which's genre is [Instant messaging]? 
answer: aol, xmpp, groupwise...
answer type: Protocol Provider.
auxiliary information: Instant messaging is a type of online chat which offers real-time text transmission over the Internet. A LAN messenger operates in a similar way over a local area network. Short messages are typically transmitted bi-directionally between two parties, when each user chooses to complete a thought and select "send". Some IM applications can use push technology to provide real-time text, which transmits messages character by character, as they are composed. More advanced instant messaging can add file transfer, clickable hyperlinks, Voice over IP, or video chat. Non-IM types of chat include multicast transmission, usually referred to as "chat rooms", where participants might be anonymous or might be previously known to each other. Instant messaging systems tend to facilitate connections between specified known users. Depending on the IM protocol, the technical architecture can be peer-to-peer or client-server.
What is the name of the protocol provider of the software which genre is [Instant messaging]?