Now,they have texting,e-mail, instant messaging and video chat.

VOA: special.2009.09.14

Previously Facebook Messenger was an app for Facebook users to communicate with other Facebook users through instant chat.

FORBES: Facebook Messenger Takes On SMS, With No Account Needed

Microsoft has announced it intends to "retire" its instant message chat tool and replace it with Skype's messaging tool.

BBC: Microsoft ditches Windows Live Messenger for Skype

Prosecutors used instant "chat" messages and emails to make the case for jurors that in the summer of 2011 Ms. Lee and Ms. Hou had been discussing ways of committing campaign fraud.

WSJ: John Liu Aide Testifies on Campaign Finance Allegations