Parallel to instant messaging were early online chat facilities, the earliest of which was Talkomatic (1973) on the PLATO system.
It is usually possible to save a text conversation for later reference.
Instant messages are often logged in a local message history, making it similar to the persistent nature of emails.
Though the term dates from the 1990s, instant messaging predates the Internet, first appearing on multi-user operating systems like Compatible Time-Sharing System (CTSS) and Multiplexed Information and Computing Service (Multics) in the mid-1960s.
Initially, some of these systems were used as notification systems for services like printing, but quickly were used to facilitate communication with other users logged into the same machine.
Some IM applications can use push technology to provide real-time text, which transmits messages character by character, as they are composed.
More advanced instant messaging can add file transfer, clickable hyperlinks, Voice over IP, or video chat.Flirting Dos Flirting Don'ts Community Q&A So you want to flirt with a guy or gal on MSN, AIM, Facebook Chat, or any other instant messaging service and you don't want to look like a creep?Congratulations — by seeking help, you've already demonstrated more self-awareness than the vast majority of online flirts.Viber is the second most popular messaging at 40%, having steadily grown over the past six months.Facebook Messenger saw the biggest fall by dropping from 39% to 34% between November to May while Whats App saw its userbase increase from 22% to 30% within the same period.However IM is basically not necessarily supported by transaction control.