In this article, the author discusses text messaging and instant messaging (IM). In a nutshell, text messaging is another name for Short Message Service (SMS). SMS is a service available on most digital mobile phones that permits the sending of short messages (also known as SMSes, text messages, messages, or more colloquially texts or even txts) between mobile phones, other handheld devices and even landline telephones. Whereas IM is a form of electronic communication which involves immediate correspondence between two or more users who are all online simultaneously. Text messaging lacks the simultaneousness, though some IM clients list asynchronous communications as a feature. If email seems to be replacing regular mail in many instances, by the same analogy one could say that IM is replacing phone calls in many instances. A few features and several popular clients of IM are presented.