Remember ICQ? After almost three decades, the once-popular instant messaging client is finally shutting down. On Friday, the ICQ website posted a simple message: "ICQ will stop working from June 26." ...

Microsoft Lync is the instant messaging client for Lync Server. It was formerly Microsoft Office Communicator (MOC), which replaced Windows Messenger. See Skype for Business. THIS DEFINITION IS ...

Telegram ranks among the world's most popular instant messaging solutions while delivering advanced security measures together with fast operation and powerful capabilities. The standard official ...

Text messaging and instant messaging are similar because they are both used to send text messages. However, text messaging ("texting") uses the cellular phone service, whereas instant messaging ...

Offer your best promotions and get to the point, already -- or customers will unsubscribe just as quickly as they opted in to receive your instant messages.