Published on Feb 21, 2020
Exchanging messages in realtime between two or more people. Unlike a dial-up system such as the telephone, instant messaging (IM) requires that both parties be logged onto their IM service at the same time. Also known as a "chatting," IM has become very popular for both business and personal use.
In business, IM provides a way to contact co-workers any time of the day, providing they are at their computers. Thus, IM is often used as a way to avoid telephone tag, whether the communication continues as text messages or winds up as a traditional phone call.
E-mail and instant messaging are often used in a similar manner, but e-mail is not realtime, and there can be delays of several minutes. Like e-mail attachments, IM systems generally allow for file transfers. Also like e-mail, some systems let you send messages even if the recipient is not currently online. IM is expected to promote IP telephony by allowing users the option of switching from typing to speaking (from text chat to voice chat) if they have a headset attached to their computers.
In order to set up an instant message, you have to add the usernames of the people you want to message with to your "buddy list" (friend list, contact list). When they log on to the Internet with their IM software, and provided they have not configured themselves as "invisible," you are instantly alerted. When they log off, you are also notified. Each system has its own method for blocking incoming and outgoing messages.
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