plz provide more info on this topic

actually Instant messaging (IM) is a form of real-time direct text-based communication between two or more people using shared clients. The text is conveyed via devices connected over a network such as the Internet. ,mainly wireless instant messaging done through WAP and J2ME , the platform include (mobile phone, PDA, etc.) to their instant communication on the Internet (instant messenger, chat, forum, VoIP, instant messaging platform)