出典:Wiktionary
instant messaging (uncountable)
出典:Wikipedia
出典:『Wikipedia』 (2011/07/14 18:29 UTC 版)
Instant messaging (IM) is a form of real-time direct text-based communication between two or more people using personal computers or other devices, along with shared clients. The user's text is conveyed over a network, such as the Internet. More advanced instant messaging software clients also allow enhanced modes of communication, such as live voice or video calling.